I purchased a new 5105M in October from my local Deere dealer. Initially I was looking at the Deere 5105M, New Holland 5060, Case IH 105, and Kubota M9540. My uses are mainly for hay production and winter feeding. I've only got 30 hours on it so far feeding hay with the 563 SL Loader so can't really review the PTO. This coming spring I'll be spreading fertilizer, spraying, cutting hay with our disk mower, and baling with my JD 535 baler. I'll put it through it's paces then.
So far I've been very impressed. The 32F/16R Power-Reverser transmission is very nice, especially the high/low option. The cab was the nicest in my opinion of the four comps. The controls are right where you'd expect them. I also have the horizontal exhaust that exits under the steps and really like that option.
My dealer was great, which made a big difference when it came down to the final decision. If you have any specific questions, I'd be happy to answer the best I can.