I watched the Belgium v Croatia game tonight where Benteke played the full 90 minutes. Having not seen that much of him before, the overall impression was a good one - although he is far from complete.
Willmots played him as the target man with two wide players supporting... He acquitted himself well in the first half, won everything in the air (he is excellent at flick ons) but had one golden chance that he fluffed.
Put clean through on the edge of the box, he had a very heavy first touch which allowed the keeper to collect.
Then, at the start of the second half, he had a shot cleared off near the line - he couldn't have done much more with it to be fair.
I thought though he tired a little towards the end - although he looked pretty pacy throughout (caveat being Croatia aren't the quickest at the back).
Overall I'd say we have got a striker with real potential who gets into good positions and will definitely lead the line well. How he would link with Bent though... That I am not sure about.
It finished 1-1 by the way.