Baxi 418 advice required before going ahead

[Funkyboy]

Under a boiler replacement grant I've been offered a Baxi 418 heat only.

Has anyone any experience of this model? Apparently it has an aluminium heat exchanger but a lot of parts are combined into one so maybe costly if repairs are needed.

Thanks

 

[ShaunCorbs]

Would go 600 series eg 618 etc or 800 series 400 is the cheap version with not much warranty