The only problem I have is the distortion. I like the way round glass fits into a more contemporary home but the whole moving around the tank to get the right perception I think may get old. Then again you may get used to it. Also take note I have not owned one just seen them. An exagerated example would be the full circle at sea world.
I would also go glass up until 250 gallons unless you use AGE. The pvc bottom makes the tank ALOT lighter. For example- We moved a 300 g AGE with 4 people pretty easy, my 360 g DSA took 6 people and was pretty hard.
Kevin- 375 Gallon Reef
Reefing made easy...