Yes, I replaced the plugs in my 2009 1.2VTEC Jazz with those Bosch plugs last Summer as they were cheaper than the originals. They were fine and seemed to improve acceleration slightly but that could just have been wishful thinking on my part at the time. I sold the car in May of this year so can't comment on the long term effects!
The owner's handbook that came with my car gave a code of DIFR 6A13G for the NGK plugs for the car rather than the DIFR6D13 code that other people have mentioned on this forum. Not sure if the plugs are the same and the codes changed or they are actually different plugs and Honda changed the engine plugs early on in production.
I remember having to remove the wipers, plastic cowl, undertray and wiper motor to get to the plugs to change them. While in there I also checked the valve clearances. They were barely out of spec at 48K miles/8 yrs. I think I had just two inlets that were 1/1000 of an inch tighter than spec. I adjusted them but it really wasn't worth the effort.
