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I've also had no problems with Miche sprockets, bottom brackets, and hubs. Perhaps I am just lucky...
I think you might be.
Sprockets - the ones with the carrier can get in the sea. Pointless invention, solution to a problem that doesn't exist. Work loose on the street and require use of a lockring so pointless for track.
That said, we are using their standard threaded cogs at work now and no complaints.
Bottom brackets - the old ones that could float a bit so you could adjust the chainline were useless, wouldn't stay tightened up where you wanted them for love nor money. Seen a few frames trashed because they loosen and float themselves over to the nds and the ds crankarm hits the chainstay, usually happens during a race or some other inopportune moment.
New ones are better as they have a flanged driveside cup to tighten down onto the frame but it can be fiddly lining the nds cup up with the other half during installation meaning they jam up half way in. Probably not an issue when you are fitting one but when you have 79 to do...
Also they use the cassete lockring tool instead of a standard bb tool. Why?!
Hubs - I find the hardware rusts up super quick and the axles are just threaded rod with no central shoulder to support the inner race of the bearing.
Italian or whatever lockring threads so you have to choose between spending £££ for a Campy or Phil (I think) replacement or use the Miche one and while the cranks and seatposts could be made of Parmesan, the lockrings are full on squidgy ricotta.
While we are on wheel components, the rims are wrong uns. Spoke holes drilled too large or too near the edge of the central well so you have to be really careful about rim tape selection and application to avoid constant mystery punctures.
I've had no issues with Miche Pistard 2.0. (Or the Miche Primato Advanced - but I am only about 60kg.) It's a very nice crankset; quite similar to SRAM Omnium. It was only about £130 when I bought it in 2018 (which is about what the Miche Primato Advanced is selling for now.) By the way, if you are looking for 170mm cranks, the Pistard 2.0 is at a very good price (£118.99) here (as are the Pistard Air).
I've also had no problems with Miche sprockets, bottom brackets, and hubs. Perhaps I am just lucky...