It's an excellent designated marksman rifle choice.
They're a bit fiddily to work on but can be tuned up very nicely. I've had more experience with the TM versions (which are very solid) than the CA/G&G versions.
NO airsoft gun is infallible/unbreakable...keep that in the back of your mind. Get the one with a good sturdy body/build...the internals can be tuned later on.
That said...this is airsoft. All things being equal....there's zero ballistic advantage between any AEG out there. Nicely tuned up...someone's MP5 is going to shoot as well as you 1 meter long M14.