I'll kinda echo Ilmaestro on this one. At the moment, the manga doesn't look to end anytime soon, and thats at 162 chapters now. The arc it's in is about to finish though. I could see the series going on for a good while actually, but doing what hayate did originally maybe worth while. Not to suggest that it'll be first half following the manga, second half being more filler-esque, as it may not get away with it like hayate can and did easily enough, but i expect it may have a couple of episodes here and there as filler.