Yes... A great experience!

(This is my old Western Digital 500GB SATA 2 mechanical drive connected to the onboard SATAII controller)
hdparm -t /dev/sda7
Timing buffered disk reads: 218 MB in 3.00 seconds = 72.62 MB/sec
(Now here's the OCZ 120 GB SATA 3 solid state drive in the same computer connected to the new Marvell SATA card)
hdparm -t /dev/sdc1
Timing buffered disk reads: 984 MB in 3.00 seconds = 327.63 MB/sec
On booting..... I have an 18 month old ASUS motherboard and the drive doesn't appear in the SATA drive list in the BIOS. But, if I go over to the 'Boot Sequence' BIOS utility, the solid state drive is listed there and I can send it to the top of the list. I haven't tried booting from it yet.