We have run Outback for the last 4 years...has got the job done but haven't been 100% satified until recently when they came and updated our software and put the new X-Drive in....Wow..much better accuracy. We have always used the little portable base unit RTK system with them and it has been okay but will be much better with the new X-Drive in our MX285. We are stip tilling now with a 8520 set up with Green Star SF2 signal and it is better than our old Outback RTK setup...the X-Drive should have cured our problems though as we will run the planter and Outback system behind the Deere SF2 strips....anxious to see how it matches up. Outback is pretty dang affordable, we have 2 tractors on the place set up on Outback with the S3 monitors and RTK ready for what the 8520 cost to set up with Green Star. I have also run Trimble just a little in my cousin's tractor and i liked it alot as well...idk now outback compares to Trimble on being user friendly, but the Outback system i think is VERY easy to run compared to Deere...Deere seems like there are a thousand things to figure out but part of it i'm just not used to it...only about 700 ac. under my belt strip tilling with it, so i will give it some time! Just like i hated running that 8520 after running our MX tractors...but now i probably like it better. As far as moving stuff around on different tractors i think that would be easy with the Outback system..we don't each tractor is completely set up but as long as you were wired up you could move the S3 monitor from one tractor to another really easy. The best thing about Outback is there is no annual subscription to anything..i think Trimble and Deere is probably about $1500/yr or more.
outback has not worked out real well in my area. could be the dealers though. a lot of people in my area are going with the agleader paradyme system. they say it has better accuracy, less signal loss and is fairly simple to use. i do know agleader is cheaper than john deere rtk.