Now my experience working in the computer shop I am in now, team can be hit and miss. We had some DDR2 in back a year ago and 2 sticks died within 2 hours of turning the machine on and installing everything on a new build, but there DDR3 ram have seem to be OK as a few machines have been built with it and there havent been any problems.
The most unreliable stuff of team I have used is there usb pen drives, they corrupt data very quickly and easily and often after only using for a week or 2. But there RAM have seemed to got better over time.