I love mine. I've had the 24hp 52" for a little over 1 season and around 500 hrs. It's what I spend most of my time on. Rock solid reliability for me, I had to replace the battery but that was my fault.
I had to switch away from riders because they were ruining my back, went to WB's but started to get too tired so the stander was the best option for me. I only compared the vantage to the toro and other WB's. Our wright dealer was too overpriced and the closest model they had was a fixed deck and still over $1k more than the exmark. I preferred the Exmark controls over the toro and the ultracut deck. The toro and exmark are by far the most comfortable to use because of the rear platform.
My only real complaint is the lack of decent bagging options. I use a side catcher now, it does fine but fills up very quickly.