Forget it if your dogs are large.
930020
Great if you have a 10 lb dog. Won't last a week if you own many dogs or if one is over 130lbs. It takes as many as 8 - 10 per serving for bigger dog. Feed 3 big dogs 2x a day.....pointless.
4508963
Be careful if you have a big dog.

I have a 90lb+ "small" St. Bernard who is absolutely obnoxious. Every night she wants to bark at absolutely nothing and wake up the neighborhood in the process. I really hoped this item would work as I don't love the idea of a shock collar. When I put this on my dog she went outside, laid on the grass and breathed in a large breath like she normally does when she lays down and is tired. AND IT SPRAYED HER! Then as she ran around the yard (not barking) it kept spraying her. Then I had to chase her around the yard because she was freaking out that she was getting sprayed with the citronella for no reason. She is very fast so this wasn't a fun event for either of us. Maybe my item was defective but I believe that such a 'large' dog may inadvertently set off the microphone by just breathing loudly.  So if you want to your dog to literally go insane for no reason, buy this product

Also, this item isn't returnable! Luckily Amazon was nice enough to still refund me
3771623
DO NOT BUY FOR LARGE DOGS! O-ring broke first time using. I have a 110lb mastiff. The concept is great. And it did limit her pulling so may be perfect for smaller dogs. But don't waste your money if you have bigger size dog. Very flimsy.
824558
Good only if your dog is trained to walk by your side. You will freak out when your 98 pound dog starts jumping all over when near another dog and you can't control him, as I did with my 98 pound American Bulldog........Do not buy unless your big dog is well trained walking and follows all commands even when excited......or be prepared to be pulled along out of control.....Palm Bay, FL.
4748706
I though my dogs would use this since they are getting old and can't jump up on the bed.  Neither one of them have any interest in it because it is too narrow and scares them.
1383062
My dog hates it...He refuses to use it and now I have a huge dog bed sitting underneath my car port. The X-Large is really big and obnoxious. The mesh is also not very tight.
877449
Would be fine for a dog less than 25 lbs, but the descriptor "large" is a bit misleading.  Bought this as a gift for a relative's Dobermans and will need to find another gift, as this thing is way too small.  Will probably just give it to my cats to play with.
3496429
I have two large dogs (one is ~95 lbs the other is ~70 lbs), unfortunately I can't recommend this product for owners of dogs that size. With the sides zipped up the weight of the dogs ripped the zipper away from the fabric within the first week or so of ownership (which was only a few car rides with the dogs). Over time the front section has become frayed and nearly worn through in a few places. One dog has a habit of leaning forward to get pets from people in the front seat, the area where he steps are particularly worn. The zippers don't seem to do a great job of staying up either. This product may work if you have smaller dogs, but I can't recommend it if you have large dogs.
4597637
This thing is huge. If you try to resize it for a small door it just becomes a jumbled mess and dogs get caught up in it. Not resizing friendly
2109394
not great if you have a large dog... the opening really isn't big enough for the "piles' my Mastiff leaves.  Makes a mess all over the tool.
514618
Built well, does not accommodate large dogs. I have a very large lab and the largest size does not fit his chest.
401038
I had many friends that loved this item so I decided to try it out. It did nothing but frustrate my dog (a miniature pinscher). She couldn't get to her food, because the grooves were not big enough for her nose to fit but they were too deep for her to really get at the food with her tongue. i think this bowl would work better for a bigger dog. It's also very large, and I think that's the only size it comes in.
4482742
These are HUGE. I didn't expect them to be so big. They would really only work for a pretty big dog. Not my Chihuahuas.
4850014
I love it.  My dog hates it.  XL was too small. XXL was too big.  I have a black lab that weighs about 90 pounds.  If you could try it on before you buy it, that would be great.  I must say, if you save the tags, and wrapping and hanger, try it on, and it doesn't work, they will take it back, or exchange it for you.  And that is done with no problems.  I have given mine to Goodwill in hopes someone will have a dog it will fit.
2441421
I had to return 2 of these harnesses (and got dinged a 20% restocking fee from this seller - on top of the cost of shipping both ways). This harness does not work with all dogs. Both my dogs fit the "girth measurement" but the loop where the leash attaches drags on the ground. My two dogs were able to walk out of the thing and kept getting their front legs tangled up. Also there is one dimension where the harness can't be adjusted so you might find, as I did, that the girth measurement is correct, but it still is too big for your dog. The description should have warned the owners of "short" dogs that this would not be a good choice.

If you want to try this out on your dog, buy it from a dealer who will refund ALL the purchase price without a 20% restocking fee. It's too risky otherwise.
3898125
I know this says for large dogs but my large dogs ignored it completely.  When I did "encourage" them to try it they did so only by force.  I think that it wasn't strong- feeling enough.

I have aging German Shepherds, not at all adventurous so that probably played a big part.
3050237
First, THROW away the dog poop bags!!!!  unless you like poop on your hands or cloths, do not use these bags!!!  They are incredibly thin and the seams open up as soon as you try to use them.  On your hands at the least, on your hands and cloths if not careful!!!

The handle on this unit is not suitable for anyone with large hands!  You hand will not fit without it rubbing.  I have to use three fingers to keep from rubbing a spot on my hands.  Also, once you lock down the least, there is at least 15 inche of distance that your dog can pull out after locking in place.  The material strethes or compacts on the inside for the extra length after locking.

The rating for this unit is dogs to 150 pounds, but I rather doubt it.  The clip is VERY small!!!!  I do not have a lot of faith that it will keep a 150 pound in check if they pull hard.  Also, the cover that goes over the end of the leash that attaches to the clip does NOT stay in place.  It easily pulls away from the end while you are clipping or unclipping your dog and then is a giant pain to put back.  I used electrical tape to hold it in place.

The locking mechanism is also a questionable.  There is a LOT of gear jump when trying to engage if there is any stress on the leash.

Over all, it is ok, but it is not more than that.  I would suggest continuing to look if your dog weighs more than 50 pounds or if you have large hands.