We used bonnet. I would say its on the same par with Dynamall if not a bit better, specially the smell. We did 1200m2 with Surround and cleaned really really well. Usual stuff, tea, coffee food stains. Director was very impressed he gave me his other offices in Wakefield to clean.
After hoovering, pre sprayed with surround, left to dwell for 10 mins, then went over with the bonnets.
Not knocking dynamall, that stuff rocks too!