Mark, I have found it depends on the job.
I have tried m-power and nemesis but prefer microsplit from restormate.
No dwell time, needs moderate agitation, use as a spotter every day and is superb. Also use it for greasy marks on top cushions of upholstery 50/50 with water when prochems fabric restorer wont shift it, same on sofa arms. Excellent stuff.
Perhaps I'm using m-power or nemesis wrong but prefer old m/s where agitation is the key after no dwell.
Call me old fashioned!
All the best,
Jason.