We have a 32cdi greenstar fitting over a year ago and it has been good.Our bills have dropped but our old boiler was a POS,we have the wireless thermostat and it is crap. It doesnt work downstairs and when there is no signal the boiler doesnt work.The only place it works is in the same room which is pointless as it is the hottest room in the house anyway.We was £2150 for the swap but there was a good bit of pipe swapping on the day of the install.