I've run two of those ms250's. They are cheaply built saws with a very high price tag for what they are.
I was very surprised how hard they were to pull over. They are harder to pull over than every other saw of their size that I have run (idk, 10? different pro saws in that size range) and even larger ones. I have about 7 saws in the 40-60cc range; all pro saws. The only ones that have a similar pull are my 1986 and 1987 Jonny 590's, and perhaps my 1990 262xp. Maybe.
So I can definitely confirm that they are a hard pull, but not nearly so hard once you are ready for it.
And yes, they flood easily. Yes, they have a laughably cheap air filter. Yes, they feel and look cheap. And they vibrate too much for a little saw, imo. My saws from the late 80's are a lot smoother. I let one of the ms250 guys run a tank thru Jonny. His first comment was "wow, is that ever smooth!" Not to mention a lot more powerful.. They are not particularly smooth when compared to a Dolmar 420 or a 5105 or an ms261 or a 550xp, or, or, or.
In my mind, the negative characteristics I noticed immediately were the hard pull (for a little saw) and the vibration.
Anyhoo..,
That being said, they are light in weight and handle nicely, they have decent power, cut good, and miraculously, they seem to be pretty durable. That's why some people like them. I suspect that most of those people haven't compared them to many, or any other saws in their cc range.
I agree with the poster who said get the small 3/8 chain if you get one. Both of the ones I ran had .325 - 16's. My Dolmar 420 with lopro 16" smoked them easily. All the chains were sharp, btw.
I wouldn't pay 500.00 (cad) for one, that's for sure. I might pay 150 bucks for a clean used one. Or not.
I'm not an echo fan boi, not by a long shot. I don't have any brand preferences and no skin in the game either. I do have an echo 590. It's a decent enough saw.
I would be looking at a few options before I sprung for a ms250. There are reasons that people put the ms250 down. They are severely overpriced for what they are. Shame on Stihl. That's the biggest negative, in my mind.