When I crashed it, I had owned it 11 months and cranked up about 17000 miles with only one glitch. On a ride from Vegas to Eastern Iowa, my toe shifter stripped out. I sure was glad to have that heel shifter, tho it took a bit of left hand reaching to downshift. Hawkeye Harley in Iowa City IA took care of me 110%.
All the recommended maintenance was dealer done at the proper intervals. As far as buying an extended warranty, I think those depend a lot on how much of your own wrench turning you are comfortable with, and whether or not the bike is your ONLY vehicle. I usually have another vehicle available, so if my bike breaks and it's not covered by warranty, it can sit til I get around to it myself, or til I have the scratch to get it fixed. Hope this helps.