I love mine. Yes the tank has it's limitations, but since I did not have the coin for an elos, the solana was my choice.
First, the negatives: No fuge area, tank is very touchy if the water level gets a slightly low (the pump creates micro bubbles), skimmer is a little loud. All of theses problems are fixable if you want to convert the center chamber in the back to a fuge, keep the water level just a little high or run a ato, and put a silencer on the skimmer air intake line.
The pros: Very nice size. The 20" cube give you depth and height. The skimmer works well after it gets broken in, the ato works (albeit it is cheesy and has to be filled at least once or twice a day), and if you don't care for the disco ball (which seems to have a really good output) you can switch to the 20" sunpod 150 or 250.
If you look in the members tanks forum, you can see my solana as it sits now. Trust me, this tank will be full soon enough

It may not look like much now, but it is performing well enough that I feel comfortable with it as a sps dominated system.
If you get to nano-reef, check out ezcompany, rodpod, and dailydriven911 tank threads. Great advice and inspiration in their threads.