I bought a Boardman Performance Hybrid Comp back in April, and have now covered over 2700 miles on it. In that time it has been a brilliant bike. It does need the occasional tweak to the disc brakes to either prevent rubbing or get the optimum braking performance - not difficult though. I stuck with the 28c tyres and it's perfectly happy with tarmac or the cycle paths around me, although I did find that Vittoria tyres it came with were a little prone to punctures (especially glass shards). I switched to Continental Gatorskins after about 1200 miles and have now done 1500 miles on them without a single puncture.
The riding position is nice and comfortable, but I found adding bar ends really helped as it gave an extra hand position which comes in handy for longer 50+ mile rides.
I did get a terrible clicking noise come from my bike after about 500 miles and initially suspected the bottom bracket, it turned out it was the pedals needed the threads re-greased and tightened a touch. I've not had any issues with the bottom bracket, and in the 2700 miles I've done the only maintenance I've had to do is change the chain, brake pads and clean/re-grease the rear freehub bearings - my fault for being too enthusiastic with the pressure washer (I've learnt my lesson). It's still running as smooth and quiet as the day I got it.
I have mudguards fitted to mine ... SKS Chromoplastic Narrow (20-28c). They fit fine, although the fitting instructions are a little misleading. Due to the disc brake callipers on the Boardman, you will have to bend the stays around the calliper to get them to fit, but it can be done. They can be a bit fiddly to fit though, as there isn't much clearance from the tyre, but they tend to stay in place very well and don't need constant tweaking.
** Edit, as it's coming from
Halfords I would suggest checking all the bolts are tight yourself before riding, rather than trust that they have checked ... a couple of mine were a bit loose and nearly caused an off on my first ride.