SSD reliablity: it all depends. I'd not trust a cheap no name company that may not do it right (i.e. remember OCZ?) for important data. I heard the news on the street that OCZ decided to buy whole wafer of NAND from Toshiba instead of let Toshiba screen and test them first. They went too aggressive and end up with massive warranty issues and damage to the brand, and then went out of business.
For bigger brands, the issue of reliability becomes where you store them and whether they screwed up their design. Newer SSD using newer NAND may have less data retention, and when powered on will regularly refresh the memory (read patrol) like DRAM does. The specs are typically target for 1 year at room temp without being powered on, or 1 month in elevated temperature (in a car under the sun). I still have my most important data backed up on HDD and located in multiple places (disaster recovery). My HDD is something that has been around for 5 years or more and with known good reliability.
