becker, these newer 4G FCC certified amps haven't been on the market very long, so you may not find anyone using this specific model yet. Wilson makes good products and this appears to be a very strong amp. The question to me is, how often do you really need a $400 50 dbm amp or could you get similar results with a $150 Wilson sleek cradle type booster. Since many RV'ers now use either their smartphone and/or a MiFi hotspot device, the Wilson sleek has become very popular and has a good track record for boosting both 3G and 4G voice & data signals.
Back to the 108 kit, the weak point is that small mini mag antenna included in the base kit. That antenna is not very strong and it requires a metal mounting surface for its ground plane. It may be a good fit if you're driving around in your car near cities & towns. But out west in the fringe areas, most of us get much better results with the full size Wilson trucker antenna for RV use.
One last comment, in the past, these kits with inside wireless antenna were problematic due to the spacing requirements between the outside antenna, the inside antenna and the cell device. Interference due to inadequate spacing was an ongoing issue. I see in the specs, this 108 kit has much smaller spacing requirements, which if correct shouldn't be an issue. But based on past experience with older versions that would be a concern for me.
I live in my RV, travel all over the western US and use 15 - 20 gig per month internet data. I have a Verizon smartphone, a Millenicom (Verizon reseller)MiFi hotspot device w/ 20 gig per month flat rate, a Wilson Sleek and a Wilson trucker antenna.
using only the smartphone may be simple & convenient, but if you're a heavy internet user, 20 gig a month direct from Verizon costs twice as much as the Millenicom plan.
