Hi
Get one!
With a couple changes (notably a different saddle) the ST is an all day, many days in a row platform for many people..
The seat has three positions: too high, higher than that, and nosebleed.
Seriously, I have about a 31" inseam and a Sargent seat; in the middle position I cannot quite flat foot it but I don't have a mania about that. On the lowest setting I can get both feet flat.
I have owned and traded in in my 7 short years of riding (in order), a Suzuki C50T, Honda 919, Yamaha FJR (gen I), Victory Vision, Suzuki V-strom, Honda CBR 250, and now have owned an ST1300 for the past two years. Also have test ridden a gold wing multiple times, but never owned it.
Of those, for long distance riding, the two sport tourers and the Vision were the best. Longest I've done on my bike with the stock seat was 600ish miles and I needed a few breaks (not many). I now own a russell seat and haven't done 600 miles since, but 400 mile days are just fine with normal stops for food or sight seeing every 3 hours or so.
All things considered, if I had my way and my wife would let me financially, I'd own a gold wing.
Of the ones that I've ridden, no offense to anyone on this forum, but I'd buy an FJR before I bought an ST1300 (provided I could afford either). That bike was EASY to ride and I felt MUCH more confident on it with it's center of gravity and super smooth engine. But I got rid of my FJR (I was stupid as it was paid off), but love the sport touring platform. I bought this ST1300 as at the time it was between that and an FJR, but this bike had an extended warranty so I was covered for an extra 5 years for about $1000 less than the FJR. The problem is (and I'm sure you'll find this too), is that the FJR is more marketable, and so prices for it tend to be a little higher. The ST1300 is a fantastic bike. I just preferred the egos and power plant of the FJR.
The ST1300 FEELS like the heaviest bike I've ever ridden. It's center of gravity feels much higher than the victory vision I owned or gold wings I've ridden, despite the actual weights. But as you'll read on this forum and anywhere, you get it moving even 3-5 MPH, and it works like any other motorcycle. I'm just not QUITE comfortable yet leaning deeply into turns with a higher center of gravity and being up higher on the bike. I carved MUCH more confidently in the gold wing and victory vision as opposed to the ST1300 (and to a lesser extent the FJR) just based on seat height and weight distribution. It's not the bike, it's me.
All that being said, it's still a great bike. I commute often, and recently have spoken with my wife of going back to a one-car household as I just prefer it and am fine riding it in any weather.
The seat is 31" give or take .5". That's about the inseam of a lot of riders. An ST may be taller and had a higher center of gravity than you're used to. However it seems with technique and decent quads some shorter riders have been very happy with it.
In regards to the seat height, I'm 5'4" with a 30" inseam. When I first got on an FJR in 2012, I was FREAKED OUT that it was so high. After time, I adjusted. The ST1300 is the second tallest bike I've ever tried to ride (you ever try to ride a BMW GS1200 with a 30" inseam? I did! I feared every stop sign!). Throw on the Russell seat and the fact that I keep it in the middle position because it seems to make the angle of the Russell seat better for me, and I've gotten familiar with the standard "tricks" to compensate.
When you hit the brakes and start slowing down, allow yourself to slide forward towards the front of the seat. It's narrower there and therefore will splay your legs less, and you'll be able to touch the ground easier. As you get REALLY slow and are within a few feet of stopping, slide your left butt cheek slightly off the center to the left (pretend you're about to counterweight the bike), stick down (not out, stick DOWN) that left leg, and as you finally stop, push forward EVER so slightly with the left hand on the handlebars. The front tire will turn a LITTLE to the right, forcing the bike to lean to the left, and then you'll have a VERY solid tripod of one leg and the two tires. Works every time, and instead of tip-toeing both feet (which feels very unstable), I flatfoot the left leg and feel rock solid at stops.
And the last advice if you make the switch from Harley to ST1300, be very carefully which direction on a hill you park. With my short legs, I have virtually ZERO leverage to back the bike out of any parking space. So I ALWAYS ALWAYS ALWAYS park facing uphill. Sometimes that means pulling into a parking space, somethings allowing the hill to "back me in" a parking space. But ALWAYS park so that you can use the engine's power to propel you up a hill. I made that mistake once. Only once. And I paid for it, having to ask others for help to push my bike backwards up out of a parking space all sheepishly, while simultaneously worrying about whether the bike would fall as I push from the front and also try to steer it.
For $3k, I'd buy that bike if it was maintained well, throw an extra $2k into custom seats, new and comfortable gear, and possibly a top box, and then go ride the hell out of the thing.
Alexi