One can never be quite sure how transfers will turn out. Even the most talented players can struggle at top clubs because there are just so many variables, so many things that can go wrong: a personality clash with the coach, fitness problems, language barriers, cultural differences etc.
However, some deals go better than anyone could have expected. This season, for example, we've seen expensive signings make light of the pressure that comes with a big transfer fee, while other, previously unknown players have proven themselves bargain buys.
But, looking at all the deals done last summer, who's proven the best value for money? Below, GOAL ranks the 21 signings of the season and, as ever, feel free to let us know your thoughts in the comment box provided...