It is your opinion that the entire line of drives are not reliable. This opinion is based on the fact that you have seen x number of failed drives. To suggest that your experience means that all the drives are unreliable and then to push it off as fact is foolish.
As far as I know, the line has 4 models - two in each of the available capacities. The 60 or so drives I have installed include all 4 models but certainly more of the 300GB models. I don't remember which models failed but it isn't unreasonable to question the line overall since they are at the bleeding edge of technolgy. It is possible that all of them were a single model. Honestly I don't remember so I'll say that your comment is reasonable because they could all have been a single model. My comment is reasonable because I had too many customers experiencing crashed drives and that is very painful both for the customer and for me.