Yep. Even the 350 pounds I paid for a 512mb (yes you read that right!) Lexar failed after a few months.
I bought two 1gb Lexar some time later and they failed.
Bought around 20+ Sandisk without issue
Local pro shop told me the only returns he gets are lexars
Other pros I know have had similar issues over the yrs and no longer buy Lexar
But people on here say they've no issue
I think once you experience a serious loss, and not just pics of the cat, you find it impossible to trust that manufacturer again.
True, but you also need to look at the cause of the issue if you can, because many have never had even one failure, so to have two like that must be pretty rare in the big scheme of things.
Plus if you were (God forbid) unlucky enough to have one of each major brand fail, you would be pretty stuck.
I do think it important to buy a card which is appropriate for the camera it will be used in. I believe (might be wrong) but the 5D Mark II has read/write speeds of around 50ish MB/s which really does make the Lexar 1000X overkill, and maybe something to do with that caused the problem.
Who knows, but I do feel for the OP. Good luck with SanDisk.
from my experiences with Lexar & Sandisk, the experiences of about 20 pro's I'd be in semi-regular contact with, and my dealer's comments, I would look on it that YOU have been lucky to have Lexar's that work rather than me having bad luck...!
I don't really understand why this is the case - there are no moving parts - it's a standard product that I assume is factory tested.
In fact I would've suspected both originate from the same factory in china,only later to be branded....
but it really looks like there's a remarkable difference between brands.
And worth mentioning that a few of my friends are nikon guys,so it's not just a reaction between lexar and canon