Yep, mediocre. Actually beyond mediocre when I saw him, but I'd like to think that wasn't entirely representative.
When did you see him? He's been improving a lot over the last 6 months, going on an Authom-like climb back up the rankings. The main difference between Maxime and Niels is that the latter has been there (in the top 200) before, and should be able to do some damage over the next couple of years. I'm very happy with both right now though, providing good support for Belgian tennis.