For a start,100% Baxi committed,but had a issue on a older CSI 85T,Guy in Tech was epic,totally on the ball,also John wilson rang me but had it sussed by then,as a company i would say they have got their act together,also there spares lady Becky Kaye is on the ball with part numbers ,from how they helped me recently i would not be afraid to fit one as a cheaper option,Honestly put my hands up and say speak as you find,i found them helpful and they just wanted to help me sort the issue