Well, straight away I have fallen in love with it. I really like the fact that it clicks! I think it's not going to be great for long periods of use, but for typing I really like it. I had a really cheap backlit keyboard before, and it was pretty terrible. I'm not 100% on the switches though, as I do really like the reds as well.
It's blue backlight, and although it's not my first choice of colour, it still looks amazing.
Overall, I'm very happy with the keyboard and I don't think I will be going back to membrane any time soon.
One last thing I have noticed though, is that you have to press directly down on the switch for it to press easier (amazing English there) which isn't something I'm used to at the moment. My WPM was 90 before I got the keyboard on a membrane, so it'd be interesting to see what it's like after a few weeks of using the MX Blues!