I've had a couple MK-II's in the past and sold them for various reasons (one would not feed reliably and was a tack driver, the other was just terrible on accuracy), and as far as the disassembly goes, it WAS difficult. It's not impossible, but difficult at first. Once you do it enough, it is not as bad on you. You have to practice it.
I too thought about A browning Buckmark, looks good, but I decided on the Ruger based on my past experiences with the factory, and how they take care of their customers. I'm waiting on my permit right now so I can go get my MarkII I ordered last week.
Can't beat Ruger in the service department.