Snap, Chris .. though foolishly I paid a little more £99.00. I found this trailer was easily detachable, and could pretty much fit onto any bike. The only real problem I had with it was that it was heavy when doing long distance (I think the furthest I took it, with the two lads, was about 30+ miles) and the hills were a killer.
Also, when the bike was finally nicked (sob sob), I found it a nightmare trying to find a replacement adaptor for the rear axle, which obviously disappeared with the bike.
In regard to child seats, I had a great one, but it wouldn't have worked on a full suspension bike, but it wasn't great for when the little one nodded off, she couldn't get fully comfortable.