I recently ordered the Silent Partner from SMI and due to time constraints I had my local Winnebago dealer install it. Since the coach has been in and out of the service department,(another story...LOL),today was the first day I had the chance to try the system out...ONCE I reinstalled the coach portion of the system myself,the system works flawlessly...It does require some "permanent" mounting of the compressor unit in the toad and a "T" installed in your brake vacuum line,but when you're ready to tow,all you do is hook up and flip a toggle switch....
I might also add that,on a SATURDAY afternoon,I called the 800 number for SMI and the recording gave me a direct dial number for whom I figured was going to be a tech....NOPE!! None other than Peter the founder of SMI himself...
He would give me something to fix and told me to go correct it and call him back....I did this several times as I had to completely relocate the sending unit in the coach.
SMI's tech support is second to none.....They will get my business for a long time.
I might add in closing they are an iRV2 sponsor as well!!
2019 Grand Design Solitude 380FL fifth wheel
2017 40' Renegade Verona LE LTS (traded)
2018 F150 King Ranch Crew Cab Diesel