I guess I should have said ... Red Sea stood behind their warrantee regarding Dario's tank (everything is covered 100% for the 1st year), but by far, there is a huge number of post through out the RSM Club extolling Red Sea's Excellent customer support.
Very sorry to hear your tank broke & it's out of warrantee, it is pretty rare compared to the thousands sold, but if it happened to me, I am sure I would feel the same way & would wish Red Sea would cover it for many years.
On a sidebar, I don't think cracked tanks are just common to RSM tanks, I was in our lfs a while back looking at corals & live stock, all of a sudden a 40 gallon breeder tank cracks right before my eyes, I holler at a store employee that their tanks leaking water all over the place, he meanders over & starts removing livestock & tells me it's not uncommon & happen from time to time at the store (they have maybe 200 of them). I was like wow... so I don't think cracking tanks are just related to RSM tanks, it's more like heaters that stick on & cook tanks - you can Google & find most brands have done it & when it happens, people hate that brand & I can see why.
Just my 2 cents... and again very sorry to hear !
I might add... being Red Sea has decided to go away from the beautiful curved glass corners in the new C series - this could be related, but the cracks are 1 in 1000 or more... just for some prospective, of all the post I have read in the RSM Club and that's every post ever posted in the club.