First of all, let me mention that I had them for about 1.5 to 2 years, so I have almost a complete opinion about this headset.

The positives:
+Very good sound, with good mids and quite strong highs.
+Bass is quite powerful.
+The microphone is good enough for conversation (not anything extraordinary though).
+Good construction.
+Nice blue lighting on the right and left sides (but be aware it's ONLY blue).
+Control on the cable with volume up/down and microphone mute.

The negatives:
-I don't know if I'm doing something wrong, but I never managed to connect them to the PS3.
-They are somewhat heavy and put pressure, resulting in not being able to wear them on your head for a long time (even worse for those who wear glasses).
-After the first year, the ear cushions started to peel off, but it's not something annoying.
-The microphone is not flexible, so I'm afraid it might break (it only goes up/down).
-In order to use them with a mobile or somewhere with a 3.5mm port, the USB also needs to be connected for the lighting to work and, consequently, the sound.
-It doesn't have good sound isolation at all.

P.S.
Overall, they are quite good headphones for their price. If you're thinking of getting them for gaming and music, then let them be at the bottom of your list for 45 euros.