Pros: - small enough
- VERY bright for the size. Seems to have a genuine Q5
- burn time is excellent for what I need it for; somewhere around 2-2.5 hours.
- decent quality
- large tail switch (nice with gloves)
- Good value for the price

Cons: When I first turned it on, it gave me the "flickering" that is so common with many of these lights. I used fine steel wool to scuff up all the contact points and threads and it has cleared up the problem.
I consider the SMO reflector it came with a con.

Bottomline: For $16 this is a great little light. Took minor surgery to get it working 100% but has been perfect since. I use this mainly around the house and mountain biking, which attaches perfectly to my helmet. I've used it for about 8 rides now with no problems. The Smooth reflector was a huge dissapointment to me, as it doesn't diffuse the light as much and DX doesn't seem to carry a replacement OP. They did say that they are now shipping with OP reflectors, but who knows. I unscrew the head 1 turn and tape it to spread the light more, otherwise the tight bright spot is tough on the eyes while riding. I really wish it came with the OP.
Overall a great value if it comes as advertised.

Pros: I bought two TR-801's back in December of 2008. I just bought one of these. They're totally different. It appears that DX is having another company manufacture them.

Cons: Differences include:
Smooth reflector (instead of textured like the description states and like my old ones)
Brass heatsink is left uncoated (brass colored) whereas on the photo & the old ones I own it's chromed.
Body is machined slightly different (thickness of cuts, depths, etc)
Only has a spring in the tailcap whereas the old ones have a spring on the tailcap & driver.
Driver is a bit different but still has same modes (strobe is slower on new light).
Brightness appears to be comparable but the LED is mounted on a different star (black instead of white).
Laser etched logos are slightly different in size & the CREE logo is not the same.
Finish on new light is a slightly lighter gray

Bottomline: Still a good light, but definitely being manufactured by a different company.

Pros: Wery bright , especialy if you before hav used only usual bulb flashlights
good four mounting on bycicle bars , as it is very compact, i use sku.15642 but a litle bit upgraded with those soft pad for furniture legs , with i glued inside, and now it works perfect
runtime is somevhere 1 hour and 20 minits after wat there is stiil useful light for 20 minits (2500ah)

Cons: I have two of them , and one works ok, but second one have problems with contact and it must bee srewwed open and close for many times to get it working, the bad thing is that I disambled it and still didnt found where is the problem cos all solderings looks ok :(

Other Thoughts: its like a lotery 50to50 will work or not , atleast in my case , but its not a surprise with this price and uncerting assembling , there are almoust 2 mm diference in body lenght

Bottomline: but 18$x2 is still cheaper than brand name :) and maybe this is only one case with those problems, so if i needed flashlight i still vill by this one.

Pros: Excelente salida, muy brillante, muy solida en la mano y pesada, en modo alto se hace bastante caliente y muy rápido, consumo en modo alto 2.05 amperes!!!!!, es bienvenida la correa de mano ya que es muy lisa y se escapa fácilmente de la mano, orings en buen estado y en todas partes, roscas perfectas.

Cons: La única encontrada es que después de unos días la memoria ya no funciona, no me molesta esto y no puse reclamo

Other Thoughts: Debería tener algún tratamiento en la superficie ya que es fácil dejarla caer si no se la sostiene con fuerza, el cuerpo es muy liso

Bottomline: Vale lo que cuesta. comprenla con tranquilidad