Scott mentioned OCZ's customer service and reliability.
So far the Vertex 4 SSD is OK.
However, I also had an OCZ ZT 750 power supply, that is a fully modular and the reason I bought it. The fan in the power supply would spin up and get noisy after a short period. I opened a Tech Support ticket with OCZ this past Thursday and in less than 6 hours I had response that it was a known problem in one batch of power supplies and they issued an RMA to return it and replace with a newer model that the fan controller circuit works properly. They even sent (e-mail) me a pre-paid UPS label to ship it back. When I updated the ticket that it had been dropped off at UPS for return they didn't wait to get it back, they released the replacement unit. I don't have the replacement yet as this all happened Thursday and Friday, and the replacement was shipped out Friday. I had a new power supply, an Antec HG620 that I was going to use in a new PC I'm building for my daughter, I have it installed in my new system and will use the replacement OCZ in my daughter's new build.
On another subject in the trials and tribulations of building PC's, I used a Corsair H80 liquid cooler for the CPU. It does its job and keeps the CPU temps generally in the low 30's (C) (and even dips into the upper 20's) but the OEM Corsair fans are noisy (too noisy for a recording studio). According to other posts this is an issue. I got some "Nexus real silent case fans" and replaced the OEM Corsair fans and took care of that issue.
I've been building PC's since the 286/386 days and its a lot easier now with parts that are more compatible. Just the hassles with defective components such as the noisy fans I had to deal with. The previous build I did a couple of years ago, the case (an NZXT) had a defective front panel assembly - the USB ports were flakey and NZXT sent a new front panel assembly.