I only put the SW Motech rails on when I use the panniers and takes a few minutes to attach them (the nearly invisible mounting brackets just stay on the bike)
With the SW Motech pannier rails I can use their alloy boxes (which are shown in the pics) or other brands on panniers as SW Motech do adapter kits for other brands like Givi
I can also use soft luggage panniers (I have Wolfman Expedition panniers) on the SW Motech pannier rails too, as they have cut outs for the luggage straps
I looked at every sort of pannier system at the ABR festival last year and bought the SW Motech luggage as it was the most versatile and being German the best finished & designed imho
I looked at MoskoMoto and thought it was pricey (albeit well made) and I just didn’t want a soft luggage option and the SW Motech system with alloy boxes wasn’t a dissimilar price and I already had the Wolfman Expedition panniers