Hi Jen! We have the mobilaire one http://www.ojmedical.com/invacare/invirc607xz/invacare_mobilaire_50_psi_compressor It looks really similar to the precision medical. Insurance covered it all and it is wonderful. Pulmozyme takes about 6 minutes. We haven't had to do tobi or other meds, but I've heard it speeds them up without risking them going over speedy....you can control the PSIs, so it really helps get the med to the right particle size.
I highly recommend these industrial ones!!! We've had ours since Alyssa was 2, can run Pari nebs and sidestreams without issue.
Heather