there have been a few failure stories out there, some with pics too
eg..
http://www.3reef.com/forums/fish-tank-brands-kits/240-gal-aquarium-blew-71619.html
but EVERY tank manufacturer can have failures. all it takes is a defective peice of glass from their glass supplier (the aquarium people don't make the glass they buy it from a glass company) and boom! you have a tank failure blamed on the aquarium people.
thats the problem with tank failures/leaks.
you really don't know the exact cause.
bad seal craftsmanship?
bad glass?
not setup on stand properly?
you just don't know...all you can do is try and place blame, and clean up the mess..
If it were me, I would not do a "blind buy" if this is an expensive tank.
I would try and personally view some of their work before ordering.
to me, thats just doing your homework..
I would do this before buying from any tank manufacturer - try and personally look at a tank that they make before you order a monster from them.