The Goldwing is probably one of the most reliable bikes out there. There isn't a lot of routine maintenance needed, and changing the oil is a piece of cake. Changing the air filter, on the other hand, is a true PITN, so if you live on the beach....

I've had 3 of them, and they were all outstanding. My '05 runs as well now as it did when I bought it new. In 14 years, nothing major has broken on it. It has only 46K miles on it, so it's still young, as Gold Wings go, but the finish and electronics have aged well. Had one brake recall done. My '94 I rode or maybe 8 years, had no major problems, only a couple minor things covered under warranty. My 2016 is only six months old..
The CG is much lower than on a big twin, and the bike handles like something maybe half it's weight. Last time I did the ERC, the kids on sport bikes were sitting around marvelling at how easy it was to do the various exercises on such a big bike. If you're over 6' tall by more than an inch or two, you'll want to change the seat, as the stock bike seems to be set up for someone 5'10" and 150 pounds..
You don't get as much to cool you as you would on that Harley, but there are ways around that. Newer bikes seem to come with windshield vent standard.
Storage is very good, if you are traveling alone. If you're bringing a woman, you might want a trailer (depending on the woman, of course..) The 18-19 Wings, though, cut way back on storage, for some reason. The sport bike crowd had their way with the design. But Corbin just came out with a $1K upgrade that makes you saddlebags larger, if that seems important.. Lot of guys are staying with the pre-18 bikes because of the design changes.. Mostly taste and needs...
Newer models have decent stereos, but you still need a good headset if you need music, GPS, etc.,. at highway speeds.. (There is Facebook group for custom F6B Wings that seem devoted to major stereo mods that turn them into rolling beat boxes.....) If you don't want a full bagger touring bike, you should look at the F6B. Same bike, street bagger style..
Best thing about a Gold Wing is dropping into 4th at around 60 and hitting 85 or 90 with 3-4 seconds when passing... Nothing better..

Engine has virtually no vibration at ANY RPM. Suspension adjustments are push-button. Second-best thing is it flies like hummingbird out of the box, so you don't need to spend money on motor upgrades or anything to do with performance.
I haven't had any problems with Honda itself, but then I've never needed to have much truck with them directly. No major problems with my Wing or the warranty. I've seen complaints, but can't speak directly to the topic.
What I don't like about my bike? Changing the air filter and radiator fluids require removing a LOT of plastic. 90 minutes minimum if you know what you're doing. When I put my legs on the highway pegs, it's a pretty wide spread, but not too bad. And of course, the price of accessories, but owning a Harley, you'd know all about that..
