Bought a 2009 GT250R new from dealer stock about a month ago. So far no problems aside from stupid-owner mistakes, like accidentally leaving it in neutral and having it roll backwards into a gopher hole and drop on the left side. Result of that was a broken mirror, JB Welded the mirror for now pending a replacement. First night I got it home I got caught in another gopher hole in the yard and dropped it on the left side, broke the left handlebar. i had a friend make a new handlebar from high-strength aluminum so I could replace just the bar and not the whole left clip-on assembly. I would prefer to see higher strength parts and/or the clip-ons and mirror pivot points give under stress instead of snapping the assembly off, but for the price it's understandable. The mirror pivot had rusted some from my recent road trip (tons of rain), so that may be why it broke instead of pivoting.
I only have 750 miles on it, broke it in with the 'alternate' method (keep engine under load, get up to redline and release the throttle to return to idle without using brakes) and the engine straightened up very quickly. I forgot to take a picture of the oil filter after the break-in, with only 35 miles on the bike the filter was almost entirely silver from metal shards, the magnetic drain plug was covered as well. Changed it one more time after another 50 miles and there was almost no crud in the oil or filter.
Due to circumstances beyond my control I ended up having to ride it on a long-ish road trip this past weekend (350-miles each way) and the bike performed perfectly. I went through 4 hours of hail, rain and heavy winds, one of the worst storms I've been in, let alone ridden a motorcycle in. The ride back was much nicer, almost a full moon and perfectly clear skies, a little cold but dry at least. Fuel economy went from 55 mpg for the first couple tanks to 75 mpg on the last tank. Going from 22 mpg with my previous work commute vehicle I am extremely pleased with that. I was surprised at how comfortable it was to ride, I'm not in great shape but still didn't feel strained in spite of the long trip. If anything my back and neck are looser than after I drive in a car that sort of distance which is a nice bonus.
The speedo is about 10 mph high consistently from around 30-70 mph, I paced the bike off of three separate cars with known good speedo's. I don't know if it's worth putting a speedo adjuster on it, still debating that one. Highest speed I reached was 80 mph (90 on the speedo) with a good bit of room to go before redline, which is as fast as I will go on public roads. I don't have the time or money to do track days, if I did I would have gone with a higher-ceiling bike, but for a commuter bike that's comfortable on longer trips I couldn't be happier.