Used for the first time at the weekend and everything went fine. I haven't used a chainsaw before and was wary of a few scare stories and the various bits of safety information on the internet.
I bought Makita because of the good reputation of their power tools in the construction industry and it looks a tidy design. Very easy to start and use. I bought the 40cm one and not as noisy as I expected (but was wearing ear protectors most of the time).
Feels light and comfortable to use. It's early days but I'm sure that any problems or spares requirements will be handled by Makita's excellent dealer network/warranty.