Pros: Cheap.
Works.
Displays speed and "everything else".
Has a dedicated spot on the display for speed, which always reads ok.

Cons: I got it set up for wheel diameter and mph vs km/hr, but can't figure out the user interface anymore. There's only two buttons here! It keeps scrolling through all the "extra" stuff and I can't figure out how to clear the distance or max speed.
The sensor uses a worm drive clamp, like a pipe clamp- except it's all plastic. I tightened mine and it was still loose on the fork, tried to get it tighter, and the plastic screw broke off! Fortunately, it was already "good enough" so I'm good.

Other Thoughts: If yours doesn't read, move the magnet on the spoke, or the sensor. Seems like the magnet needs to be on the center on the sensor bar. Turn the sensor on the fork so it's on the backside of the wheel, so just in case they DO hit, it'll knock it away, not jam in closer.

Bottomline: I'd be disappointed if I'd spent >$10 on it. For ~$5, I got what I paid for, and speed was really all I wanted in the first place. I guess if I find the manual, I could probably figure out how to get the other features working in a useful way. Be nice if they were more intuitive.

Pros: + Many functions
+ heh, may be all functions u need
+ good display
+ computer body don not look likes fragile (but I don't try crash it)
+ good and easy-to-understand manual

Cons: Appearance of the device is awful and is more similar on made temporarily, for carrying out of any tests program maintenance which will live later in more graceful body
Magnet fastening to spokes is not suitable for application: has collapsed at installation
Fixing strips present at the complete set all rejected also are not suitable for application
Gauge fastening not suitably to application: does not fix the gauge and collapses from easy effort
Gauge fastening is realised in the silliest image and at damage cannot be replaced (the typical decision: fastening on fixing strips for some reason has not been applied)
Crunch and serious effort on buttons

Other Thoughts: The price should be less, an order $2.30-2.70 that it made sense to buy the given product

Bottomline: it works even at -18C, buy it when it will be cost $2.50

Pros: Man this is my worst DX deal... It desn't work for me, it turns on but don't show the speed or whatever...
Pros it is cheap, only good thing!!!

Cons: I got it and thught it would be nice but it is UGLY, bad design, looks like it was home made...
Big pieces, loose clips... everything is poor at this product...

Other Thoughts: I don't recommend!! I got ashamed to put i on my bike even if it work... too ugly!!!

Bottomline: Not a good product, be aware!!! Doesn't make you happy!! Lost hours trying to make it work for nothing!!!

Pros: this unit works good, not able to tell you how precise it is or if i even have it isntalled correclty, wasnt sure wher ei should install the senor on my wheel. I did rout the wire neatly and had to use electrical tape to hold it in place around my front fork. this looks and and installs just like brand name units ive had in the past

Cons: mine wont turn off, its always on

Other Thoughts: i wish the menu would be more clear to navigate , altho it is quite simple i wish for maybe a third button, i wouldnt take this off road and use it seriously, for me its just a guideline.

Bottomline: good price, works the same as brand names uni do