My neighbor just bought one a few weeks back. He says it does a nice job, but I haven't seen it in action. It is quite long...you'll want to make sure you're not going to be using it in a confined space, or maneuverability will be an issue. What model tractor are you looking to get a tiller for? The DR tiller is very pricey, you could find a really nice Model 1 and purchase a 3 pt hitch and still have lots of money in the bank for what the DR cost. I have a model 1 tiller I used on both my 73 and 1250 and it does a great job. Just my $.02
Jason