OCZ had a monopoly in the market of SSD's for awhile. At one point, 70% of SSD's consumers owned were OCZ. Now, OCZ's SSD's weren't the most reliable, but because they had such a large share of the market, the failure rate was over dramatized. That being said, the 4 series and Vector are not only fast, but they have amazing quality especially compared to the 1, 2 and 3 series.