For me personally, I couldn't buy without test riding. I've ridden my friends Buddy 125 and my bro-in-laws Fly 150, but put over 7k miles on a 50cc Honda Metro. Seems like you're more used to scooters so it may not be an issue for you.
I had it delivered and all the paperwork handled from TO Powersports for $4300 cash even. Got it at the end of August, and I'm only approaching 900 miles on it so far.
It's a little tall for me (30" inseam). I don't mind the seat, but some people have commented they find it uncomfortable or that they 'want to' sit closer to the hump. I can't flatfoot it. I can put one foot flat, if I tilt a little and stretch my leg out, or if the street is angled. (I can put just under half my foot flat usually). I think one of the complaints I've read about the seat is that it's a little painful after an hour of riding. I haven't noticed it (perhaps because I'm shorter, I sit in a different position).
The sideview mirrors don't bend back as far as I want. I can't seem to angle it without me getting my arms/shoulders/side in view. I'm not sure if that's common to scooters or not, but I like being barely able to see myself to maximize my views.
I had some issue with my seat latch: I think the mechanism needed to wear in, but it was difficult to force the seat to latch for the first month. I'm sure this kind of thing varies in every scooter.
I got the tachometer weirdness for less than .2 miles at my first fill up (with 18 miles on the odo), but other than that, absolutely no engine issues or anything funky at all. It hasn't come back. Most of my daily commute is under 50mph, but I topped at 72mph (indicated) on a test speed run recently.
My only big complaint is my MPG. Workday commuting where I am destroys me - check my fuelly link below. I did get better the week I went with the LA Scooter Group (70ish). My current MPG means I need to fill up about every 70 miles or so. My minor complaint would be I don't like gassing this scooter up. The gas cover is awkwardly placed for me, I can't tell when I fill it fully or not. And if you get any splash or gasoline dribble, it'll either look ugly or risk messing up your pants! That's actually something I dislike more than I originally thought I would.
I had commented before in this forum about my MPG being a little low; Rippinyarn had said when his scooter was new he was getting 55mpg before it started bumping up. I'm pretty sure that my location (West LA) is what causes it. My traffic is worse, my red lights are greater, my stop signs are more frequent, and my traffic is ahsadajsgdasjd. That's really the only major complaint I've had.
And I'm not blaming the scooter for it, it is what it is, but I would keep it in mind if a lot of your riding is workplace commuting in traffic or stop-n-go streets. The other two scooters I mentioned above also get less than average MPG for their models, which is why I'm convinced it's our location/traffic conditions. (Though both their MPGs beat mine)
edited for another potential complaint: the lights at night. The default front lights look a bit odd. It's not an even illumination, it kinda bends and creases at angles. In fact, when there's no streetlight, I can literally read the imprint on the light casing, because it's left as a shadow that doesn't get illuminated. Kind of funny.
You might want to ask your dealer if you can try to see the lights somehow. That's something that usually doesn't get noted during a test ride (daytime settings).
another edit:
Pet carrier spacing can be tricky. I was originally more concerned about fit because my seat wouldn't latch perfectly.
My full face medium sized GMAX GM48 helmet fits in there, but not much else on top of or on the sides of it. (Stuff things into the helmet?)
I tested a medium sized modular helmet (bell revolver rally) and it kind of fit in there, but it needed to be squeezed in and it would push up against the seat, so I didn't think it was trustworthy.
My modular is a large (had to return the medium) but I wouldn't even try to put it in the pet carrier.
I specifically am trying to find ALL the potential negatives to 'warn you' about in this post

As you can tell from the length of the post, I'm really nitpicking, but it's an expensive thing so I figure I'll throw every scrap I have, just in case any of it is helpful in your considerations.
Overall, I'm happy a few months in on mine and approaching 900 miles. I loooove it when I'm riding for fun, or on wide open roads, or especially Highway 1 from Santa Monica to Malibu
