That's actually a really good deal for an SSD of that speed and size.
A couple years ago, I upgraded my old computer to an SSD. First time using one. All I could afford at the time was a 64GB one with only mid-range speeds. It was good enough for my purposes, though. I didn't need ton of space because I was only going to use it for the OS and other programs. I knew I could expect an impressive jump in performance from it, but I was still simply amazed at how much difference it made.
Aside from the start-up time, the most noticeable thing to me was my load time for League of Legends. I went from being 7th to 10th slowest at loading (out of 10 people) to usually being 3rd or 4th. And I can guarantee you that I was beating the load times of people with raw specs much stronger than what I had (2GHz, 2GB ram from 2006). I also wasn't really expecting it at all (and it doesn't completely make that much sense to me), but I also saw an in-game improvement of about 5fps after the upgrade. Frankly, that computer had gotten pretty slow (comparatively) over the years, and the SSD is the only reason I was able to stand using it until I was able to build this machine last year.
When I built the new comp, I made sure to get an SSD for it as well (don't know that I could ever go back). I got a 128GB one this time, but I still only use it for OS and programs. I have a regular HDD for bulk storage.
Thinking about my experiences with these SSDs, I would definitely recommend considering one for people who have the money. As far as the price premium, it's actually one of the more noticeable performance improvements for the cost, I'd say. I will also say, though, that if the base specs of the computer are actually pretty strong, the improvement in performance isn't nearly as noticeable.
Though I do really like that they are completely quiet, and I like the concept of using one for a laptop because of the extremely low power draw. That, and laptops usually aren't as strong as desktops anyhow, so the performance increase would be more noticeable in a laptop.