I got my first mow of the season done yesterday. It took about 40 minutes to cut 1/2 acre of fairly flat lawn.
First off, the CVT drives quite nicely. While this mower does not have cruise control, I was easily able to find a comfortable speed and keep my foot in position well. Slowing for turns to cut the radius and then speeding back up were not an issue. It just went. The gas gauge barely moved, too.
This mower cuts very well. Even at a fairly high 3" deck height and having a mulch plug installed, the deck was not shooting clippings everywhere. When paralleling the sidewalk and the driveway, there were very few stray clippings shooting out. I didn't bother sweeping because the wind took care of the few that were not dropped back into the grass. The cut appeared to be fairly even. Some folks have stated that the lower-end Deeres can leave a strip of uncut grass. I didn't notice that today, and will keep an eye out. The jury is also out on how well it deals with mulching a lawn full of very tall grass.
Ride-wise, this mower is a comfy place to spend time mowing the lawn. There was a little vibration that made its way through the steering wheel to my hands. Going over some unseen bumps wasn't a jarring experience and didn't seem to upset the machine. The steering was accurate, good enough to place the machine up alongside the edge of landscaping features without worrying about veering into them. It's also quick to respond to steering input, although turning circle isn't quite as tight as I'd like at about 30" or so.
The downsides of this mower are that being a Briggs engine it's fairly loud. Earplugs are a recommended accessory. It does vibrate a little, although nowhere nearly as badly as other riders I've used in the past. It's also a bit slow while mowing, at least for me. But it's thorough in mulching, which a higher ground speed would diminish.
Overall, I'm quite satisfied with the Deere D105 so far. It's a nice-cutting, easy to handle riding mower that likes a relaxed pace. There certainly are faster riders and more powerful riders. For the price there may not be a better-cutting mower.