Very cool! sort of difficult to get them all filled ...
926508
Very cool!  sort of difficult to get them all filled and into freezer so some only come out a half ball, but still work great.  Ice balls last all evening .  Would recommend to my drinking friends as I think it would be great for alcohol drinks.
4052760
I really like these and would have given a five star but they were a little difficult to put together. Great for filling for decorations or melted chocolate for dessert.
3498317
Decided to try these because the copics have been so hard to get my hands on lately. These are really cool markers. I'm barely starting to use them, and it takes some time to get used to them! They're not necessarily something you can jump right into, because you need to get the hang of the times that you leave the blender end on, etc. I suggest watching YouTube videos! I do smaller coloring, usually stamped images, but I think these wouldn't be as good if you're coloring on a larger scale because you would have to stop often to get the color right with the blending tip.
2492897
Such a brilliant idea. A few of the balloons didn't fill, but that wasn't a deal-breaker. I'd definitely order again. They do need to be filled in water (We used a cooler) and used soon after they're blown up, but these were a great find!
3753453
I got it for my husband as part of his father's day gift, and he loved it! It seems very sturdy and well made. It was very difficult to get his cards into though, it had to be stretched out a bit before they would fit.
2153652
I lot of fun but very difficult to find helium to fill it up!  The helium problem is the only reason I am giving it a 2 star! Otherwise it would be a 5!
4529156
The square cubes are great. However the circular cubes are very difficult to fill. The top lid does not seal/snap/click in place assuring minimal water leakage therefore not all the circles are complete.
1792527
Pretty easy to use.  Just need to put the two pieces together and fill with water from the little holes in the top.  Just make sure not to overfill!  All of my little ice balls have nubs on them that are hard to get off from the water fill up hole.  I also have one unfortunate looking squished ice ball because something was pushing on it in the freezer, but other than that, they look great!  I can't wait trying these with something other than just water!  Maybe some lemon, or juice...mint leaves perhaps? :)
4609899
My 10-yrd old son did this with some help from me.  He loves 3D puzzles and this is probably the 5th one he did and so far the most complicated.  Some of the most difficult parts is forming the cylindrical columns which sometimes tend to unfold.  Also the roofs which you have to insert the 4 tabs is difficult to aim all 4 tabs in the slots at once.  Once we got them into place, I made sure to glue it to prevent being undone.

The art is really neat after everything was assembled.

Bought this on Woot on sale.
4754367
Well i think it is pretty awesome i mean i have 2! But these can get sort of frusturating.

ps. Definately buy them!!
3995730
These crystals are really cool but kind of hard to use. till I give it a 5 because its different.
1767035
These molds are super fun and versatile. It took me a while to figure out how to fill the sphere cubes though! At first I tried to fill through the holes, but it tuns out that you fill the first try 3/4 full and clamp on the top. Takes a few tries to get it right, but it's still fun to do. I get a lot of compliments when I have a few drinks with friends over... the large squares look great with whisk(e)y!
4599901
I bought these for part of my daughters party favors.  They were very difficult to blow up.  FINALLY, I figured out the trick to blowing them up.  The only way that I could get them full of air was to blow them very full, then with the part still in my mouth I had to use my tongue to plug the air hole for about 5 seconds and then quickly move it and plug it.  Once I started doing that trick I had no issues getting them all the way full.  Before doing that the air would just quickly deflate before I could get them plugged.
4079002
I bought this as a birthday gift for a four year old. He likes to mix colors, so I thought smaller containers would be better so he would have more colors to mix. He loved them! This would work well at a birthday party or for gift bags, as there are a lot of colors, and stickers are included for writing names. I thought the price was fair and he enjoyed them a lot. The only issue we had with them was how hard they were to open! I even had to use a butter knife for a few of them, but this might just be because of the smaller containers, as I have never had a problem with the full-size versions. Overall, I like how many you get for the price (15 small cans), and the kids enjoyed it.
1961575
This is a great card,  no doubt about that. Ironically, I'm having a little trouble filling it up. I already have 12 full games and 8 indie games. But I haven't even filled it half way. Nothing wrong with that though, better to much than not enough! =D
403208
Pretty cool ! As long as ypu don't have a lot of big stuff to put in it....
3964794
Very cool idea, nice design. Makes cubes a little faster than a traditional tray. I love the idea that it is sealed off so flavors don't transfer into the ice, and that it can be used as an ice pack in a cooler, or that once frozen, things can be stacked on top of it in the freezer. The only issue is that the cubes are not quite as easy to get out as they lead you to believe, and they are not as uniform as they could be (not that THAT matter too much).