I have grass collecting bag as well, it was hardly used as I never collected grass, it mulches it quite nicely. There are a few bits with it, speed wire needs to be adjusted as it comes off the hook all the time, didn't bother me as I was always using high speed. Also there is intermittent noise as if it cuts out, either carburator is blocked or needs cleaning.
It works but definitely needs servicing. Private mechanic probably can fix it over the weekend.