Of these three cams I think the B1W has the best image quality overall. A118c might be better daytime and the G1W-S is equal at night, but the A118c falls flat at night and the G1W-S isn't as good daytime but not by much. However it's a brand new cam so it has no performance history yet. Personally I think it's a viable choice. No screen but the Android app works well and the build quality is good judging from the exterior (haven't opened mine up for a peek yet). The B1W has a lowish bit-rate which means there's probably not a lot of room for improved image quality but it also lets more time fit on the SD card and it should run cooler too. There is more development going on with it so it might get even better.
I've 'abused' the G1W-S by constant recording in high heat and had no problems. I can positively recommend it. I have no experience with the A118c but in normal use it seems as reliable. Haven't had the B1W long enough to know how it does when 'abused' similarly. No fakes or copies of the G1W-S, opposite for the A118c, and there are a couple similar cams to the B1W but if you buy from Estore009 you'll get a real one. The A118 is an old design, the G1W-S a new design in an old case style. Both use the well-regarded Novatek chipsets and both are on the bulky side. The B1W is more a modern sleeker design but with a lesser regarded chipset and the same sensor as the G1W-S for good night vids.
All are good choices for an economy cam. Which one is something you'll have to decide yourself. The wedge shape and familiarity of the A118c, the sleekness, price, and good overall vids of the B1W, or the solid durability and good night vids of the G1W-S
Phil