But it's MLC flash. I wouldn't use MLC flash for a boot/OS disk, it's just not reliable enough for a partition where lots of writes happen. Especially the new generations of 32nm MLC flash chips will apparently have serious life expectancy issues.
Also I don't see any advantage in having large SSDs since the speed difference is noticeable mostly on the boot/OS disk, not on the media partitions (your movie won't play any faster if it's on a SSD) and as OS disk for Linux 32/40GB is more than enough.
Ok, in a notebook/netbook where you can have only one disk a large SSD can make sense, but in that case a PCIe card SSD is useless.
I just bought a Transcend SLC flash SSD (32GB), found it on special offer at $200 (normally around $300) so couldn't resist. I haven't put it into use yet though.