Thanks for your reply.
Can I ask what you use it for and have you had any punctures?
I'm looking for a low maintenance bike - have you found that it is?
Also, I see the mudguards aren't quite full length - are they effective?
I'm going to Dublin on Wednesday - which cycle shops would have the biggest selection of hybrids?
Cycleways on Parnell St have a good selection
I use it for commuting through Dublin city centre and also for longer journeys, 30km or so, on occasion. I have not yet had any punctures yet. I guess I've done around 2000km. The bike came with Marathon Supremes which seem good. If you buy good quality puncture resistant tyres, keep them well inflated and take care riding over sharp objects (including potholes) you should not be getting a lot of punctures regardless of the bike.
It is low maintenance so far, but I haven't really used it that much. Disc brake pads wear slower than rim break ones, the minor downside is that it can be more difficult to tell they are worn and to get the right replacements. They also don't need adjustment as they wear like rim breaks do. If the pads only need replacing once a year then you can get this done as part of a service. The belt drive or gear changer do not require any oil which is nice. My gears were very slightly out of alignment after a month or so but the shop pretty much insisted that I bring it in to be adjusted after a breaking in period and as part of this they adjusted the gears to be aligned again. This sort of thing happens as a result of the cable stretching so it will happen with pretty much any bike. The problem was pretty minor anyway. At some point you will need to replace the tyres and break pads, the same as any other bike. You should need to replace the 'chain' and gears FAR less often then a bike with a conventional chain and derailleur.
The mudguards are fine. I consider them to be full length actually. It is possible to get extremely long versions but these ones are the usual. I did have extremely long guards on a previous bike and they weren't significantly more effective and they were constantly getting banged in to things, to the extent that the rear one eventually lost about six inches after being clipped by a kerb.
For a city commuter bike having dynamo lights is a big benefit. They are always there so I never have to think about whether I'll be out after dark or if the weather will turn bad during the day. I never have to worry about batteries or charging. I wouldn't want to use a commuter that didn't have dynamo lights in the future. I'd be happy to go back to a regular chain and derailleur or rim brakes if there was a good reason to, or to get a new bike with a belt and disc brakes either. Those features are interesting to me but not a deciding factor. Mudguards are essential, but they can be retrofitted to most bikes and most bikes for commuting will already have them.
If you are looking in shops and you go to Cycleways (which is a good shop) you may as well go to Cycle Bike off Capel Street on the Luas line too since they are close by. They have a good selection and I was happy with the customer service.
The Giants are nice, however with them it is worthwhile swapping tires as I was not impressed with the factory ones. The Canyon one looks nice but for a commuter bike, depends where you work, secured bicycle shelter, yeah, at the side of the road or business park with no dedicated shelter, that would be to much money for a commuter bike and I would be worried to much.
It is that kind of a nice bike that it attracts the wrong crowd as you can see it is an expensive bike.
I've been running 32mm Marathon Supremes on a couple of bikes for the last few years. Lighter and faster rolling than regular Marthons or Marathon plus but also less puncture resistant. I usually get one or two punctures a year on them over ~5k, including one sidewall tear last year. A good tyre IMO, but expensive.