I went with the We Boost Drive Reach OTR with magnetic antenna mount purchased from Powerful Signal.
weBoost Drive Reach OTR with Optional Antenna Mag Mount
Top Signal MagMAX OTR Trucker Magnetic Antenna Mount TS432010
Installed a 12 inch square of 430 stainless (18 gauge, Lowcostmetals on Ebay) on the AC cover using a 12 inch sheet of 3M adhesive from Amazon. 430 Stainless is magnetic and holds the magnetic antenna mount very firmly, no conerns with it coming off while driving, I leave it up all the time..
https://www.amazon.com/dp/B01HP2CEG8/ref=cm_sw_em_r_mt_dp_6782RH1811VXPVTJ6T93?_encoding=UTF8&psc=1
Finally, I bought a zippered case that holds the all of the antenna parts and mast which breaks down.
https://www.amazon.com/dp/B01JGQVQBU/ref=cm_sw_em_r_mt_dp_FP4B2HMQ0P6VN55WKGB2?_encoding=UTF8&psc=1
Initially I found it almost impossible to put the antenna up and take it down though because the cable would twist so badly when trying to screw the mast onto or off of the magnetic mount. All of that was solved with a CB antenna quick connect which makes it super easy to put up and take down in a couple of minutes.
https://www.amazon.com/dp/B01G2E1EIO/ref=cm_sw_em_r_mt_dp_KD45ZMK22XYXKD740XTK?_encoding=UTF8&psc=1
So far I have tested it in three places that I have camped before. In 2 of the 3 I would usually get one bar or less and was unable to make calls, get internet, stream content, etc. The We Boost worked really well and got me up to 3 bars.
The third place was in the Anza Borrego desert. No bars with or without the We Boost. So as everyone says, you have to have some signal to be boosted, it will not give you something where nothing exists. For those situations I carry a Garmin InReach just for emergencies.
Worth the price? Maybe. For me it is because as much as I hate to admit it, I like cell coverage even when camping, particularity for streaming Pandora which we really enjoy and in case of emergencies.
Cheers,
Randy