Helped a friend get his 70 gallon tech tank (I have a truck so everyone likes me!). Man, the glass is thick! His 70 gallon is heavier than my 90 gallon AGA. There is some difference in clarity, but the low iron/starphire glass is still bluish in tint. The corners are beveled, which is very nice, and I liked the thin overflow hugging the back wall. My Megaflow looks like a tumor compared to his. Also has a thick lip frame around the tank, so plan on using magnetic holders instead of hang-on anything.
Just my observations