This is my first GT, previous home had small lot I cut with a simple push mower. We were extremely excited to get this and at first were beyond happy with it. The top speed is fantastic, and it cuts grass nicely.
The honeymoon ended at 15 hours when I couldn't drive up a slight slope. Turned out the drive belt had already worn out and it's not under warranty. There's $40. I kept it heavily greased, but the front wheel bushing still wore out- again not under warranty- upgraded to aftermarket bearings for $50. Second drive belt wore out at 41 hours, bought an after market one for $60.
The next issue is the steering. This model has turn-tight where you watch your wheels turn to 50 deg or so. One word of warning is turn super slow. If you don't they slam almost 90 deg and dig in. The issue I have is all the slop in the steering. I was able to move the wheel an inch back and forth with just the slop, so I called tech support and they said it's normal. If I wanted a tech to come look, there is a service fee.
As for dealer experience, let's face it most of the time it's a high school kid with a part time job with little to no formal training on tractors---maybe they watched a video for 20 minutes. If you are looking for dealer support, I'd suggest starting at an actual dealer like John Deere.
Overall it's a nice mower, but I think the corners Sears is cutting are starting to show. There are some simple upgrades they could provide to greatly increase durability. I'm not sure how long it will last with the field plow they offer or the box grader. Based on my experience so far I won't be using it for anything but snowblowing and grass cutting, nor will I buy another. Honestly wish I would have looked elsewhere.
I did find a fix online for the slow reverse, in that regard it's much more tolerable.