I have a Corsair Voyager GT (16K) memory stick and - I have more problems with it than a Verbatim 4K, I bought it because it claimed superior burst speed. The Verbatim is faster by any measure and that was given to me by Martin of Webfeet - ideal site for UK dancers.

this is what Corsair say on lifetime:

There is no definitive answers to your questions sorry but the warranty is for 10 Years and if the drive fails in that time frame we will replace or repair it. Additionally the Flash we use has an expectancy of 10K writes per cell so if you write something to the drive every day for 10 tears you would still not use the hole write availability

I left the spelling as sent - you gotta larf ain't ya?