I think this is potentially a great signing.
1, We haven't payed millions for him and he's on loan till the end of the season, if he doesn't work out no one will care.
2, Because of reason one the guy will have little pressure on him from fans etc.
3, He's 6'4, athletic, throws everything but the kitchen sink at you and has been linked with top clubs such as Chelsea, Real Madrid, Inter Milan, F.C. Porto, Olympique Lyonnais, Manchester United, PSV Eindhoven among others, if he does well surely we will be able to buy him?
Have to give it to Roeder all his singings so far have seem to be well thought out and he doesn't neccesarily look to spend millions straight away althought martins was 10M i'm sure you'll agree he's been well worth it so far and definatly one for the future at his age.