Yea. they are pretty reliable, especially the newer ones. They are working hard to eliminate all of the shortcomings of the pre-2005 models.
But they are like owning an air-cooled Volkswagen, ya gotta do a lot of maintenance that many people aren't used to doing these days.
And like stated above, you are going to have a few different muscles hurt that you didn't know you had. If you have ever ridden ATV's off-road, your learning curve won't be so difficult.