I have a 4100 with collarshift. This is a very simple and durable transmission. It has no bells or whistles. You must either stop, double clutch or use engine RPMs to shift gears. For most uses, it is just fine. The L-1 gear is as low as you could possibly want for rototilling, ect... and the other gear ranges are nice too. The downside: it's not as handy as a hydro for stop and go-reverse type of uses like some loader work. The transmission does not have live PTO, so mowing in stop and go situations is a little more hassle. But I have learned to operate mine just fine and shifting is second nature to me now with this machine. I would recommend that you drive both collarshift and hydro models and decide if you can live with the collarshift or not. Myself, I saved the extra $2000 that a hydro would have cost and used it to puchase a mid mount mower and a 3PH blade. I have a wide variety of implements that I use, including a FEL. I get along just fine with my collarshift.