just like skimmers, different pple has different views...
i'm pleased with my own DIY skimmer, but pple like roidan goes all the way to ensure that their water is 100% fool-proof...
same thing for glass...as weileong mentioned, if our corals are lousy ones, then no point have sapphire glass...
if its me, i will certainly go for acrylic...one reason, i can make it myself...but then again, the scratches will be a big headache...