I'd be all for us signing him. The argument about him not being that good because of the team he plays for is one of the most ridiculous things I've heard here. He'd improve our midfield a lot - despite not being top bracket - but would also be a great fit for us also.
As he is a very well-rounded player he would excel in a midfield two. Given we are a side synonymous with wingplay and width down the years (even though our widemen haven't been performing), his accuracy and range of passing would suit our style down to the ground, not to mention he has a very sound defensive game which probably gets overlooked, because of his creative ability.
Not only that, we would finally have an alternative goal source instead of just our strikers. With that in mind, he'd add quality which isn't in question, but our midfield would be very well balanced with him alongside Carrick and he would suit our style of play, while adding goals.
I'd be all for us submitting a £20M in January.