Hello Feg, not done one yet but a little more work is involved time wise and price tends to be less. Reason why I went for bbs was to have bike up and running fairly quickly for work. Price wise a plug and play kit is about £180 cheaper than a BBS on woosh and probably cheaper buying from China even with p&p and duty. Rear wheel option (fitting looks neater) is my next job when I find a suitable mtb, then I can go off road also hoping I can get a another battery mount from woosh to save money on next build and interchange between two bikes.