I think there was a bad batch. Mine's ancient, I must have bought it 5+ years ago, along with the DC07 workshop manual which is excellent although utterly pointless for me now, and it's been fine!
I've seen them fail, so there are iffy ones out there, but mines done 200+ lifts, and is still rock solid! No paint left mind.
However, even on the 201st lift, if you're not careful you'll slip the holder off the chassis and give your thumb an almighty wack and it'll hurt like f**k! You have to have the correct position and angle of lift