MDS Engines - any good?

Hi folks. I've got my eye on a MDS 40 engine on fleabay. It's new, unused, still boxed.

From what I've read, they're made in Russia, and build quality could be an issue.

But if you inspect them internally, and remove any loose material, or tidy up some moulding marks, then they're pretty decent with good power.

Any opinions or experience you could share?

I agree with Eric they used to have a terrible reputation, personally I would look for something like a Enya ss40, very reliable or a OS.
Just found this on Facebook market place...bet he would take £60. a superb engine.

I have had Six MDS engines. One, an MDS 48 in a Ripmax Nova was my very first RC Plane. It did it's job. One was a great little fast one till it hit a tree. Four of them were not good runners at all even after a lot of bench running so never actually flew.
So, like others say, get a TT or OS or any other type which have a reasonably decent feedback.