anyone have any thoughts on a Robinaire RG3 recovery machine

http://www.robinair.com/products/rg3...covery-machine

opposed to an Appione G1 recovery machine ?

http://www.appioninc.com/products/recovery/g1-single

I only work on smaller systems usually systems 7 tons or less ...... I like the idea of oil-less but then I do not know a lot about the various recovery units .....