My Logitech G15 was infuriating me as the keys were getting sloppy, and took next to no pressure to accidentally key in something in error, so I decided a new keyboard was in order. I've been hearing rave reviews about mechanical keyboards from everyone I know that has one.
So, a few days ago I splashed out on a Corsair vengeance K90. I paid a little more through Scan as I trust them and DPD (in this area) and as my mum was off work I had no problems with delivery.
Anyway, the keyboard is here and it's taking a lot of getting used to, and not only that you cannot tell where the capslock is when you're typing as it's all one level, and not recessed like the Logitech. I'm slowly getting used to it, but I really don't feel that this keyboard is worth anywhere near the money I paid for it (£103 inc delivery). The replacement for my G15 was the G19 and that was £144 and as I'm not a massive gamer anymore, I wasn't bothered about the LCD screen for game stats/irc/etc, so it made no sense to get that.
Anyway, the point being that if you want a mechanical keyboard, go to a shop and see if you can prod a couple of them, as this feels very flimsy when keying in anything, but oddly sturdy at the same time. Still, I have it now and it glows, which is important to me as it's normally dark in this room, and as I'm getting used to it I imagine it'll end up being okay, but it feels like learning to ride a bike again.
The G15 I'd give 8/10 and this I'd give 6/10 on first impressions.