Ed... Have rented H-D's numerous times. Most of the time I rent through the authorized H-D network. Can find the many locations at the H-D website under "Get on a Bike", then "Try a Bike". I've come across many riding in the west on Eagle Rider rentals and they're having a good rental experience. If I have a slight Eagle Ride hesitation it is I've seen some of their rentals and the bikes look "well ridden". The authorized H-D program retires bikes after a certain number of miles, and I've never had a high mile bike.
Haven't compared the costs between these two options lately. Would also note if you are a HOG member, they have authorized rentals at various locations as well, and their rates are very low -- a benefit of being a HOG member.
Use them (Eagle Rider)every time we make it out to Vegas. Great to deal with, never had a problem. In fact the bikes were always current year in great shape as opposed to the one time I did a "Fly & Ride" in Hawaii, stripped down worn out Road King.
My experience with rentals is not recent... did a Fly and Ride to San Francisco in '96 and had an E-Glide Classic for a long weekend... the folks in the shop were very friendly and helpful, the bike was freshly washed... I don't remember the mileage but had zero complaints.
I have done a couple of HOG Fly & Rides, one of them out of Vegas. I highly recommend it, the bikes are in good shape (owned by HOG) and set up nice for longer rides, tour pack, back rest, etc. I learned to bring along a set of highway pegs and a RAM mount for my GPS. You rent directly through HOG and it's only $100 per day, although they do have a two day minimum. Another nice thing, you can pick your bike up in the morning and return late in the day on your return day and not be charged for the extra day, i.e., pick up Monday AM, ride Mon, Tues, Weds, return Weds. PM and only pay for two days!
Guys from work on a union convention used Eagle Riders to rent bikes in Vegas. One of the guys had a small fender bender and all was taken care of with the insurance he bought from them. Said they would rent from them again....