I just recently purchased my cube, I think they must be doing something different with the newer versions because I have a heater, it's set to 78 degrees, my tank never gets any hotter than 80 degrees.
As for the lighting, the plants (thus far) seem to be doing well. I have a couple planted in the back that I am hoping will grow tall to fill in the tank some. Right now, all the plants look a bit low!
I really, really love the tank. I haven't had many problems with it (save one regarding the fans that I'll mention in a bit). I'm keeping a few Otocinclus in it, 1 Dwarf Gourami, and 1 African Dwarf Frog... I might add another ADF but right now I'm not sure. The local petstore has a pretty sickly looking bunch and two of mine have already died do to pre-existing illnesses
I looked at the stores tank today to see four dead frogs in it!! My remaining frog looks healthy, eats well, and moves about quite readily.
Oh, I forgot the ghost shrimp. I have two ghost shrimp and they do a pretty good job at cleaning up any scraps!
The cooling fans: during shipping the screws holding them in place probably got loose and on the 5th day they made a warbling noise. It was a bit obnoxious but after letting the fans run for an hour it went away. I did call up the company and they are sending me new fans just in case I need to replace them completely. So, in dealing with Oceanic - I haven't been disappointed.
I change the light setting throughout the day and I notice that all my tank inhabitants really enjoy when I put on the lunar lights.
I guess in the end we'll see - I'm going to try to keep up with this post to journal the cube