It's also the first solid state drive I've ever owned, but I've seen quite a few in action and this is by far the best.
You know that box that used to show up whenever you copied or deleted files? The one with the progress bar and the 'time remaining' ticker? Well I catch glimpses of its outline every now and again, as it pops up for a fraction of a second, but I've almost forgotten what it looks like. I only see it when I'm copying files larger than 500MB or so from this drive to the HDD that serves as a storage drive, and even then that's only because it's being limited by the write speed of the HDD. All in all, you'll not have a speedier experience.
For games, I did a little test on loading times, and in every case they were cut buy at least a half. Assassins' Creed III was slashed from 24 seconds down to 4. That's a reduction of about 88%. Loading times aren't the most important use of an SSD but they're certainly a huge plus.
As for startup times, it's getting to the point where I have to sit down and get comfortable BEFORE I turn on the computer, because otherwise the thing's up and running before I've had a chance to adjust my chair. Most times Windows 7 doesn't even have a chance to finish its startup logo, and you barely see a flash of the welcome screen before you're at the desktop, ready to go. My friend has an Agility 3 SSD and it takes at least twice as long to get that far.
Now it's come down by about £50, with prices at about £170 across the board, this is looking more and more like THE ~256GB SSD. It's faster and bigger than most drives of a similar size, which are usually 240 or 250 GB, and writes much quicker than the 128GB model if you believe the supplied numbers. Add on a 5 year warranty and you've got probably the best SSD on the market. I'd say it's also pretty future proof - this is already knocking on the ceiling of SATA III speeds, so until a new standard comes out, this is as good as you'll get.