Will be first call in future

Recently took my A4 convertible in for diagnostic as it had a misfire when warm. Gentleman called Mike checked everything and showed screen shots of diagnostic which was cheaper than getting injectors tested elsewhere.. successfully diagnosed an intermittent fault with one of the injectors. Drove car away changed what they advised me to change and perfect.. no pressure from them to book it in to do it.. very helpful will be first call in future (hopefully not near future).