So far it's actually my favorite tank of the three (fluval chi & edge are the other 2) in terms of ease of use. It has a nicely fitting lid with easy open access, high powered lighting with great full tank coverage and a minimal modern look. The other 2 have the look, but with pain in the ass lack of a lid or lack of access and less than ideal lighting.
Now for the downsides...
I did find the filter too strong for a betta. However I think it could have been easily baffled with some peat pellets or other filter media in a black pantyhose or something. I tried using a cut loop from a clear plastic bottle, which worked but the betta was curious and would get sucked through once in a while. I ended up losing the back magnet which holds it in place, and so I just replaced the filter with a tom's mini internal filter which is the exact same size, looks nearly identical, but has a lower flow I can direct flow and do not need to baffle. Surprising the little filter has cycled (with the help of plants) and ammonia and nitrites read 0, but I do feel that my other 2 tanks have better filtration.
Also be aware the light is pretty powerful and sufficient for freshwater plants but can definitely promote algae. In my case it is the only tank in an area that has a brief amount of direct light - less than 20 minutes only in an otherwise windowless dim bathroom from a small skylight. And so far it's getting the most brown diatoms of the three with only a 5.5 hour photoperiod and no ferts or enriched substrate. But it does have only low light slow growth plants - anubias, mosses and javaferns and it's newly established so diatoms are normal, but I fear future algae issues. I would actually recommend it for moderate lighting faster growing plants and I wish I knew this when I set it up.
My last complaint though is an aesthetic or emotional one that is probably not shared by many. I just feel at this point that 5 gallons (with plants, heater, substrate it is actually 4) feels too small for a betta when it is in these tall or square shaped sizes. I personally think the poor thing looks stuffed in there, but I can't imagine any other kind of fish going in there... really it would make a great shrimp tank more than anything.
Anyway... all in all it is the most painless small tank I have ever had and my betta nelson has the least chewed tail of all the three. So I guess his vote is that it works!
I will try to post a pic tomorrow if I can.