I much prefer acrylic. I think they are much more attractive than glass. They are lighter weight and won't crack or leak. They can scratch but scratches can be easily buffed out. I've had one acrylic tank for 30 years and it's in near perfect condition. I have many other acrylic tanks as well and would never buy another glass tank. Acrylic is more expensive but, I think, well worth the difference in cost. Plus they can easily be drilled for bulkheads, drains, etc.