I bought some megs ultimate quick detailer the other week and the nozzle broke after 2 uses. Awful quality plastic, product is good though.
Autoglym rapid detailer also does a decent job.
I only use them as a drying aid as it stops you getting those unsightly water marks, but have used them on the odd occasion the car is jusy dusty and they both performed well.
I think i'll be getting one of those bulk ones next. Seems better value than the smaller bottles.