I have this and 2 ish years on its still good. Used on Mac with digital, PS3 and ps4
be warned Microsoft do not make the adapter anymore due to the new pads having the 3.5mm jack
Both models are now £89.99. Still a good price, but £71.99 would have deserved heat.
Got the a40 and mix amp and they do work on new Xbox one controller just old model that they don't with out the adapter . Also the sound quality is very good but not used the a30 but I'm sure they are just as good.
Bought the A50's highly recommend them if your serious about your gaming sound. These are great also.