not sure why everybody else's is bad but i've been having a good experience so far.
EDIT: took apart the ol’ 76 puch maxi and my speedometer jumping around issue turned out to be isolated to this speedometer drive. bearings in it were shot and the thing is damn near falling apart after i tried to regrease the bearings. i guess it’s not meant to be taken apart… garbage. time to get a NOS one i guess
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plastic garbage
September 26, 2022
taco eater :
ALEXANDER SHAR from WESTCHESTER, CA United States
broke in less than 10 minutes. had to restore my old one made out of metal.
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They're fine
April 12, 2022
taco eater :
Goshen mopeds from Goshen, IN United States
Seeing the previous reviews would lead you to believe there's something wrong with these. There isn't. If you've gone to 12mm this is your bolt on option. Space it correctly and you won't have issues. Used with great success on many builds. Its success depends on your mechanical ability.
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They don’t make’m like they use to
September 5, 2019
taco eater :
RufusVonRieles from Houston, TX United States
Not as smooth as my 40 year old stock drive but at least it fits on a 12mm axel.
Edit- GARBAGE, failed within 5 miles.
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it works
January 24, 2013
taco eater :
conor Boone from Lexington, KY United States
a loose fit on stock maxi lielu spoked wheel axles, but it works. Also a little wider than the vdo unit (less spacers). Also, the stock cable fastener threads fit is tight(you gotta use a wrench)
still works after a few months… OK NVM 
They're fine 
it works