Hello to everyone here!

This is such a wonderful forum. I've been lurking for awhile now and finally decided to join, so this is my first post! I don't have any betta/s currently, and am just learning about them now, so you'll probably see lots of newbie questions from me.
Now, onto my question. I am looking at this tank:
I saw the 1.5 gallon cube at Walmart, but feel it is too small so am looking at the 3 gallon one online. If anyone here has a tank like this, can you
please post photos of it and tell me exact inches of the
TANK only, not counting the black base or light. Also, are you happy with it and do you feel it's fairly roomy? I already checked out the post with everyone's tanks, and saw a few cubes in there, but couldn't always tell which size they were.