Not the tidiest but I've seen worse. As others have said, your warranty is invalid without the Benchmark page being filled in, and you wouldn't qualify for any extended warranty anyway as there's no system filter. Looks like they've used the external rubber flue seal inside, so presumably the internal one is either outside or in the bin. Can you take a photo of the flue outside? Will be interesting to see whether that's been installed correctly...
Did they give you any kind of thermostat or is it just the timer on the front of the boiler?
Did they give you any kind of thermostat or is it just the timer on the front of the boiler?