I recently conducted a search for properties in the Balham area. Most of the properties I viewed were with Jacksons as they specialise in the area.
I saw several very nice properties and all the sales staff I spoke to were helpful and polite. they also had good knowledge of the area and didn't seem to mind all my questions(!)
Unfortunately my circumstances changed and didn't get as far as putting any offers in, but I would recommend Jackons to any prospective house buyers.
Happy house hunting.....!