I almost always use the aerosol stripper from Home Depot. I like it's ease of use and I think it strips faster because it's easier to get good coverage. Plus, the less you disturb the stripper (by brushing) the better it seems to work. It's more expensive to buy the aerosol, but stripping is a nasty job and the spray makes the job easier/cleaner so it's worth the extra cost for me.

I spray on a good heavy coat then cover the stripper with plastic to slow the evaporation.