Easy to use website (although not very accurate, see next paragraph), good prices and fast well packaged delivery. So surely 5*. GSF along with most other online battery suppliers, have inaccurate automated battery match software for a Ford Focus 2015 - 2018. I had seen the Yussa battery advertised on several different online sites, along with the Bosch, Varta, Excide and several other not so well known brands. The size specs are pretty much all the same as specified as a match for the OEM for a Ford Focus Mk3. However the OEM (Varta produced) battery on the Ford focus Mk3, has a slot on the top centre of the battery for the battery fastening clamp/bracket. None of the batteries, as far as I can see, advertised by GSF have the slot/cut out. As they are all the same height as the OEM battery it means they are around 2cm to high to be able to fasten the securing clamp/bracket. You just cannot reach the bolts with the nut, I had to get a plate made. So GSF, when advertising batteries for vehicles such as the Ford Focus mk3 (including ST and RS models) you should indicate that the clamp will not fit. You could even offer a clamp/bracket that does fit at an addition cost. I am sure many like myself would have purchased both rather than have to go through the pain of finding a engineering company to make me a one off clamp/bracket.