I have it and I love it! I too considered getting the 10g, but I already had a stand for a 5g tank so that's what I got!
I don't use the filter and I replaced the lightbulb for a fluorescent one.
If you do buy It at the store, open it BEFORE you buy it!!! I made the mistake of not opening it at walmart and when I came home it was shattered! Some stores won't let you retern it and won't believe that it was shattered before you opened it!
If you don't use the filter there is a HUGE opening in the lid that a betta could easily jump out of. What i did to cover the hole is, I took a napkin and folded it the a size big enough to fully cover the hole. Then I took some Masking tape and taped it into place. The masking tape works great as it doesn't leave a residue and come right off the glass/plastic!
The sealant work is a little sloppy, but I just put the bad side facing the wall.
All in all, I am Very pleased with this tank and the price is awesome!