I bought my mom an ADA Mini-L for her Bday...it is nice, and yeah the glass is low iron. It is a nice little tank, I will never see the hype with them tho. My Seaclear tanks are more clear, and honestly have a more pleasing look IMO. Acrylic isnt really that easily scratched if you are careful and only use appropriate tools...plus its an easy fix if you do scratch it unlike glass
Besides, you can't see the scratches on the acrylic in 95% of the time. As for ADA? If you have the money, go for it. If you are talking about price versus values, I think ADA is on the low side (low values). Being a high quality and expensive tank, it does not make your plants to grow any more nicer. A $10 petco tank and the ADA one serve the same function. If the tank has some predrilled holes to add additional accessories, that's a whole different thing.