A copy of my opinion, from the PM I sent to Ken...This is just my opinion, though.
This bike is pretty fun, for a 700+ lb bike. couple things to consider is that it IS a large bike, and if you're short, and you can't straddle it and put both feet flat on the ground, don't get it. There's another forum just for ST owners where I also post.
Normally, people tend to modify the bike right away. There are handlebar risers and seats available. I've put a remote garage door opener on it, and am looking for a new seat now. The stock seat is OK, but for long distance, won't make your butt very happy.
Cruise control isn't an option on the bike. I'm also looking to figure out how to install an Audiovox system. There's a system available specifically for bikes, with a kit just for the ST (from Australia), but it's kind of expensive (about $1100, I think). In addition to the cruise, I also have a "crampbuster", and plan on installing a throttle lock. I'm also looking at some riding "blades". Those are just highway pegs, but for some reason, they called them blades.
All told, I've only ridden with one other ST, but it's most definitely the most fluid, sexy bike I've ever seen on the road. They just flow, and I love watching them. And riding mine.
Go ahead over to the ST1300 forums and lurk a while. There's always a bike for sale, and most have been modified. You could save a significant amount of $$$ buying used. Owners of ST's tend to baby their bikes, and they're easily ready to go 100,000 miles without missing a beat. It's one of the few that owners will put those kind of miles on, and just keep going.
Mine's a baby yet, since I bought it new, and have just over 2600 miles on it, but I love it. I've done those miles in the last month, and I'll head out and put 200 or more on it on a Saturday, just to ride it. And that's in Texas, with the temps at or above 100.
It does have a heat problem, in that the seat and tank get kinda hot. There are some fixes for that. Seal the space between the riders seat and the tank helps, and I'm going to try getting some heat shield fabric, and installing that between the tank/seat and engine bay.
There's a lot of info there, so go ahead, spend some time on Google and the ST sites, gather what information you need and decide. I've not heard any complaints from FJR riders, but I don't follow that bike. I think for many, the choice was between and FJR and an ST...some went one way, some the other. Both are good bikes.