G1 don't support TRIM in Windows 7, a background utility to help the drive "Self-optimize." Else you can download the "Intel SSD Toolbox Utility."
But most any SSD will still be faster than a HDD.
Let me find specs. G1 are 50nm, G2 are 34nm, g3 will be 25nm. Still looking for r/w.
Here's one article: Serious Competition...
As for what I'd do, I'd get a G2. Or wait for G3 'til X-Mas.