I had never problems with OCZ SSD-s. I had an RMA after 2 and a half year with Vertex 2 60GB (I forced it to fail...

) and they give me a Vertex 4 120GB back...

But surely i just have positive experience with them.
One of my friends useing a REVO drive 2 100GB PCI-e ×4 card about 3 years and it still working fine without any error.
I know there where problems with Agility and Vertex 2 and 3 series but they were solved with a new firmware.
I tried since then ADATA SP900 Pro and SP600, Corsair Neutron GT and Samsung 840 series SSD-s and I did not find too much difference in real life performance. I know there are performance difference between them but they are almost impercaptable for everyday user.