Seeing as how the tech behind SSD is quite similar to thumb drives I have to say that I have a 1 gig thumb drive that I have had for MANY years and have used it a lot. I've transfered info to and from it more times then I can count, and then used it as the swap file when I got my first XP machine, and now I use it for my aging laptop with Win7 on it as a system boost drive. It's lasted for years with no failure, however I've had othe drives that quit working 6 months after I get them. In the end, as with old platter drives, it comes down to luck of the draw and manufacturers quality assurance. Given time, if there are problems with the tech, it will get worked out and they will get more reliable. As for the drives being reliable and trust worthy, there are companies that use SSD tech as their main drive system. As an example CCP, the company that makes and manages the EVE Online MMORPG game uses SSD server drives in the server cluster for their game. I seriously doubt that they would rely on the tech for their server clusters if it wasn't reliable and had low failure rates.
this is exactly why i do consider shifting to SSD (if it wasn't for the high price obstacle)... i've had a 4GB flash (not known brand, i got it cheap) for like 5 years now and have been using it almost every day and its still going hard