I have been using ME Fitzroy as a belay / cold weather jacket for a couple of years now. While I generally find it very good, I could use an inch or so longer sleeves. The body could also be a bit longer, especially in the back. I have briefly tried size XL in the shop, but it was not much better in this respect while being way to baggy in the body.
In reply to Zgemba:
I had exactly the same problem with the ME Fitzroy. Size XL is way too roomy in the body and the sleeves on the Large size are at least a couple of centimetres too short. Body length,as you say, was not great either.
The Generator Alpine (Large) is a much better fit - longer arms and a longer body. An almost perfect fit for me. I think the specs were very similar, when I was looking.