Just got my P7 today, http://www.dealextreme.com/details.dx/sku.19189 , and all I can say is WOW. I'm very happy with the one I picked. Has a good wide hot-spot that throws further out than I could ever reasonably need while not being so narrow as to be tunnel-vision inspiring and has a good halo of light outside the center as well. Can easily see anything in my path even if it doesn't fall directly in the center. I had been perfectly happy cruising along at 20-25 with my little 3 watt led torch so long as there wasn't a lot of oncoming traffic drowning out my light and this thing might as well be daylight in comparison. It puts out a luxurious amount of light on high. My only complaint is that I wish the strobe mode was slower. This is seizure inducing fast. Definitely an attention-getter and I may use it during twilight hours when solid lights get lost but at night it blinks too fast to be useful if it's aimed up the road. Honestly I don't think I'll be using high mode all that much on road unless I'm absolutely flying downhill, low mode provides atleast 60% as much visibility at distance and is just as good for stuff in the near field.

Construction feels excellent. It has a good heft to it. All the threads are clean and tightly mesh without grinding. O-rings in all the right places though I should probably grease them. The thermal paste under the emitter isn't centered well and blobs out on one side but looks to be close enough to not substantially matter. Lens feels chintzy, won't be suprised if it breaks or scratches easily. Heat-sink arrangement looks good, don't think I could improve upon it much without adding extra material or complexity and seems to work well. It gets warm rather quickly but levels off just as quickly and after being on for 15 minutes was still very comfortable to hold.