Messy if you use small feed (seeds/pellets)
357123
This feeder has a gap between two parts - the base part on the outside of the cage and the base part on the inside of the cage.  The width of the gap is roughly the thickness of cage bars.  If you use small pellets or seeds, a little of the feed can spill out of the gap.  It spills out when you first pour seed into the tube and more can work its way out if you tap the feeder.  In my case, the feed doesn't go to the bottom of the cage, it spills onto the floor.  So, I definitely don't recommend this with small feed.

I also found this feeder a little messy when it came time to take it apart as you would when you clean it.  I didn't find an easy way to remove left over feed when I took the base apart.  At least some of it spilled into the cage and onto the floor.

Speaking of taking the base apart... mine hasn't broken as it has for some other reviewers.  However, my guess is that some broke one or both of the two hooks that attach the base part inside the cage to the base part outside the cage.  The hooks seem small and I found I needed to put a little pressure on the two parts to mount one on the other.  I imagine you could break the hooks if you were having a difficult time getting the parts mounted and you use just a little too much pressure.

Needless to say, I do not use this feeder.

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2519286
I wrote to Todd's seeds because my seeds molded before sprouting each time I tried to sprout them.

 Todd's seeds replied "This is due to the cress and arugula in the mix. If over soaked they will become engorged with water, enlarge, gelatinous and suffocate the other seeds. We include a small amount of these seeds in the mix to counter act this effect while still getting the taste of the seeds. I recommend soaking this mix for a shorter amount of time (2 hours should be enough). Letting the mix dry shortly on a paper towel after the soaking stage and each rinse can also help to stop the cress and arugula from absorbing water caught with in the seeds."

After following their directions, seeds sticking to the sides of the jar when putting them on paper towels and seeds sticking to paper towels when dried, I have given up.
3681996
If we try to put pellets in this it just jams up, so we can't use it as a foraging feeder.  It works fine with safflower, so it's good for a treat.
2915321
These seem like quality pellets and fish really like them, but there are two points of caution that I discovered:
1. These induce aggression among my otherwise three peaceful fancies. Switching back to flakes takes care of it.
2. The pellets are a bit too large for my 1.5 inches fish and I need to make sure they only get one pellet each - enough to chew and gulp on for a few minutes. The smallest of my fish is a black more and with it's notorious poor vision it would often drop the pellet that hasn't fully softened up and can't be swallowed yet. So I sometimes need to reach in and scoop it out to prevent water pollution.
Otherwise seem like great food, especially if you have larger fish.

Update 7/12/15: Having been feeding this to my fish as a primary nutrient for a few months now I am confident this is a quality product. To help diversify the diet I am also giving them some soft boiled green peas (homemade) and Omega One Freeze Dried Shrimp
115116
Bought this for my Saint Bernard. The water bowl being so close to the food is a recipe for a constant mess, especially for a dog who drinks a lot. The food is constantly wet and soggy and the water is constantly full of dog food. The tray is designed to hold water in the top which I assume would be helpful if you had a small dog (small mess) but if you had a small dog you wouldn't be buying this product. I drilled some drain holes and put another bowl under it to catch the spillage but got tired of having to clean everything every time the dog eats. Bottom line I pulled the water dish out and just use one side. If nothing else, it helps the dogs understand this is the big dogs food but she still eats the food on the floor.
One more strange thing that might be helpful to some. I don't know why, but when I feed my dog in this feeder she sticks her nose in the food and spreads it all over the place making a big mess and spilling food on the floor.
307254
This is a great treat for my cats, but you don't need to use all the seeds at once. I put about 1/3 of the seeds in a margarine container that I've poked holes in the bottom of, mix some of the dirt with more from my garden, water it regularly, and it grows like crazy.  I get three uses out of the product instead of one which make it much more economical.
412513
Had an infestation of pantry moths from birdseed.  They infested dry goods in the kitchen, eating through the outer cardboard and inner plastic liners from the boxes.  Forget about things like oatmeal, pancake mix, grits, etc.

I honestly could not believe how many there were stuck in the trap, as I had only noticed a few flying about.  It took 2 generations to rid the problem (about 2 weeks).  Now all birdseed goes into the freezer for a couple of days before thawing and feeding my pets.
949881
Stuff often falls out of the sides, especially when the food shrinks a little. I used some cedar and wire to make little walls to prevent this.
4694195
We have several types of Finch living in our NWF Mini-Habitat, they seemed to prefer the seeds that are in our smaller feeders for Sparrows, and larger type birds, than this Fancy Blend.  I had to mix in other Finch favorites before they would eat from their own feeder.  I will not be ordering this product in the future via Amazon.
1997281
It has cut down  a lot on my conure's mess. He does have other dishes, and loves to make a mess. But the seeds he gets in that feeder are not on the floor.
1271763
I have two kittens who are both messy eaters. The neater feeder catches 95% of the food they toss around while eating. Like the description says...this is designed to keep the food separate than any spilled water allowing you to save the "spilled" food. I've recently switched to smaller food pellets so some of the food makes its way to the bottom reservoir but it's not that big of a deal. The main thing is that my floor is kept CLEAN! I recommend wiping down the bottom reservoir if water spills so it doesn't get moldy (this hasn't happened to me since I clean if often but I imagine it could get gross).
536543
The pellets of food aren't tiny like in the picture, they are pretty large. Also, I don't know whether this was just because of poor handling or what, but there were a lot of crumbs; I had to open the bag to see what the food looked like, because all I could see was crumbs. I haven't fed it to my rats yet, so I don't know if they like it or not, but so far the food seems okay, except for the size of the pellets, and the crumbliness.
195434
HINT:  A great way to get high nutrition for your birds.
Mix "fine" pellets with baby food.
My cockatoos love it!!
2852112
This is a fairly small package that seems to contain much more mulch than seed.  It did cause grass to grow, but it was very thin and not very dense.

I think you would be better off by just sprinkling some loose seed.  The seed included does not have their water retention coating.  It also does nothing to cover the odor from the dog urine to keep the dog from coming back to the same spot over and over.
729951
I have very messy eaters that think the best food is at the bottom. Does great catching overflow until the reservoir gets full. But I'm able to dump the extra food into another bowl so less waste. It's a little small but works good for cats.
3242882
I found these very frustrating to use specifically in the very small containers of&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Sheba-Premium-Cat-Food-Perfect-Portions-Pate-Tender-Beef-Entree-2-CT/dp/B01ESVQ2FI/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Sheba Premium Cat Food Perfect Portions Pate Tender Beef Entree - 2 CT</a>&nbsp;for which I purchased them.  I've been using a plastic spoon and wishing for a mini spatula to get the "gravy" portion which stays down in the contours of the plastic containers and resists everything but a blast of water which defeats my purpose.
4624638
I just use a puppy pad in the pan for the puppy and she uses it like that. The litter didn't seem to work for her. She just tired eating it and the pellets were too large I think for her to feel comfortable on.