I think it is a really interesting signing mate. He clearly showed a lot of potential 2/3 years ago and looked premier league ready. He has faded though, at least in terms of appearances. It is a bit like our signings in that he has shown great potential, but has lost his way a little. Leicester do have a lot of very good players though, so perhaps he has just been stuck in the queue. Either way be interesting to see how good he is in the championship.
As for Watford overall I still dont know what to make of them. They have been a basket case of a club for a while I think, at least in terms of managers. They have some superb players, but I suspect top league vultures around europe may turn to them as the window progresses. Then we have their new manager, who I rate very highly, but time will tell whether they fit each other. I have them in my camp of 'could run away with it, or could finish 10th having had 3 managers'. I suppose teams like Watford are why the championship is fun.