Braking mechanism will fail!
934070
Horrible, do not buy. The braking mechanism stopped working right after my window to return -- activating the brake does not stop the leash from extending, which is dangerous when crossing streets.  Just prior to this, the ribbon would get stuck and I had to fiddle with it during walks to get it to work.  I should have returned it then!
2510837
TOTAL FAILURE, AMAZON!!!  you guys cannot be slipping like this in terms of product failures...this is another one for me...this usb is a defective part that will not be recognized by my MacBook...thankfully I checked and detected the failure before my speech...but I won't be looking for the replacement part thru Amazon for this...going straight to Logitech!
2203878
This cable is now 10 months old and has failed.  Last year (2013), the emergency brake cable on my 2000 Taurus failed.  That's not unexpected as the car was 13 years old at the time and the springs and sheathing of the cable had finally gone bad.  Ok, that's fine.  So, I decided to replace the cable and do a brake job at the same time.  Why not?  Bought this cable.  First of all, it didn't fit great, and after I had everything together and actually used the emergency brake a few times, the cable retention clip on the driver's side rear break housing broke.  Ok...what do you expect for this price? So, I modified the clip and tried again.  The next thing that happened was that I noticed the retention mechanism that holds the cable tight to the car's frame on the driver's rear side was too small, and it ALSO BROKE!  So, another modification.  Finally, last month (7/2014), all of the springs rusted through after 1 WINTER!  All of the springs are broken and my emergency brake doesn't work any more.  DO NOT BUY THIS unless you have a deep and intimate relationship with your car and want to spend a lot of time doing maintenance on your emergency brake cable.
1132929
Broke down 100 miles after install cost me a 70 dollar tow... should not be sold unsafe. DO NOT BUY
2610893
Has a recall for safety issues- do not buy-
3613924
Today when I was testing driving miniPRO in the park, it suddenly tilted so far back by itself that I fell off the unit and sprained my ankle. Upon some investigation, the Internet forum was filled with complaints about the "speed punishment" feature that was implemented in recent firmware of miniPRO. What this "feature" does is that when you drive over the speed limit, it will tilt back to force you to slow down. The intention is great, but so far its implementation is severely flawed. The tilting threw many riders off balance and caused them to fall off the unit, so this "safety feature" becomes the very thing that makes miniPRO "unsafe". I didn't know about this until I experienced it today and then saw the many complaints online. So this unit is going back to Amazon. I have no interest in a product where I can be injured by its "safety feature", which is idiotic beyond imagination.
1894389
I had to replace the set because one of the rotors were warped and caused a bad vibration when braking.  I bought these specifically because of their so called standards that are supposed to prevent this in the first place.  The second set broke in much better without any vibrations.  However, it squeals when coming to a stop with light pedal pressure.  With firmer pressure, it's fine.  I hope this goes away in time or I'll be replacing the pads again with something different.  Very disappointed with power stop.  I see them advertised on the Power Block TV shows all the time and thought it should be a no brainer.  I will not be using them again.
4169150
The banjo bolt surface is not machined correctly so it doesn't sit flush, brake fluid would leak out everywhere - rendering this brake caliper completely useless....
2693801
Had pepboys install on 11/28/2014, less than 8 k miles went back to pepboys for horrible vibration on 1/26/15.. they reccommend turning(( WHAT)
here I am again back at pepboys for the samething from Jan.. Now they telling me they are too warped & to thin to turn...1. I don't ever do crazy braking & only drive into the office 1 day a week & drive around on the weekends..2. I always apply brakes WAAAAY ahead of time..3rd these are POWERSTOPS...4. Now I have to pay again to have them installed....Needless to say, Agent on Chat(Mary) is sending me some new ones, I will see what happens in the next few months with these
2955980
Extremely poor product ! Apparently meant to save on collision ? I have had my dash cam mounted every time I have driven! I was rear ended 3 weeks ago on a highway and sent across into another lane to collide with a truck! The dashcam never saved the collision and when my car stalled after the wreck the dash cam decided to turn itself off too without saving !
2637558
Not worthy! this price you can buy a much better one within this site. This one is short of brakes which is unbelievable, how and where my child could ride this? Only in courtyard or hallway? ! She even cannot ride this bike in amuse park, since outside of the house is not flat ground, little bit dangerous for kids. Try other bikes with brakes!
4418148
Like other one stars this only lasted a few trips out under my 10 year old. Then the rear wheel drive ceased working. Obviously a sprocket type issue as the chain still rotates under power - but not the wheel. One piece design means no fixing it. - Back it goes! Disappointed 10 year old. As always you get what you pay for - should have known better.
2901385
I read the problems with this device in the other reviews but thought I could work around them.  I was able to successfully tighten the cable with the adjustments I made, but alas, the device is not strong enough.  After pressing and releasing the parking brake a couple of times during my test, the device collapsed, bending and twisting into a non functional shape.  Not strong enough.  Do not buy!
944324
I think there is a reversal in the +12 volt and brake connector pins or harness but not sure which has the problem. It would be good to hear from the Mgr. (curt) to suggest a fix.
3364613
My grandson rode this bike maybe one hour when the brakes simply exploded. All the pieces just tumbled off! I am at a loss as how to fix this..
1570814
The title for this review says it all.  After the third or fourth time they were used, the main wheel on one of the cars broke and could no longer move the car.  Needless to say, having only one functional car defeats the whole point of this toy.  Based on the numerous 1 and 2 star reviews, this is not an uncommon issue.  I would stay away from this toy until the reliability issues are fixed.  Otherwise, just realize that you are gambling.  On a positive note, the toy was actually a lot of fun while it worked, which makes the unreliability all the more frustrating.
682335
After 15K miles the derailleur blew apart, jammed the rear wheel, trashed the wheel, the chain, the tire, AND MY CARBON FRAME. It's totally a design flaw. Inspect them often. If they are starting to wobble replace it.