For whatever reason I was looking through my post history and thought to check the price of a previous deal on this torch, and lo and behold it's at the same price again, which is handy because I lost my last one, and since bought a shorter tube in preparation for the next deal (link here if you're interested in making your own stumpy S2+)
Great basic, cheap torch with decent light output. The choice of options (7135 x4, 7135 x8 etc) refers to the number of LED chips, so the higher the multiplier the brighter the light.
Really well reviewed light - see http://budgetlightforum.com/node/57133
You'll need an 18650 battery and a charger if this is your first light of this type.