You get a 3 year warranty with it so if you don’t have the service every year for 3 years at least you won’t get the parts replaced for free if it was to need any,they will also come to you to do it on your drive etc.
It’s a lot easier if it was to need a burner to have them replace it for you as it’s quiet tight in there if you don’t know what your doing,well worth the money imo I had a 5kw before I now have the 9kw 2 man system that’s the 1 to go for.