No, the PT5000 alone is not a reason to reject a watch. It does give you a specific choice: a thinner movement and a smoother-looking seconds-hand sweep, set against reports of winding and setting faults whose frequency we cannot verify. If you want those visible benefits and can get a workable return or warranty route, it can be a sensible buy. If the prospect of a failed movement would ruin an inexpensive watch for you, choosing another calibre is reasonable.
What do you get for choosing it?
The PT5000 runs at 28,800 beats per hour and is about 4.6 mm thick. The NH35 runs at 21,600 beats per hour and is 5.32 mm thick. That explains the PT5000’s smoother seconds-hand sweep and why it can help a brand make a slimmer watch. It does not prove that every PT5000 watch will be thinner or more accurate than every NH35 watch: case design and adjustment of the individual movement matter too.
The Cronos 36mm Explore PT5000 is a concrete PT5000 example. The Addiesdive 39mm Retro Mechanical Watch uses an NH35, but it has a different case size and design, so it is an illustration of the other movement rather than a like-for-like substitute. Buy the Cronos if you want that watch and accept its movement; do not buy a watch you like less simply to change the calibre name.
What is the actual risk?
The linked discussion includes an owner who says a PT5000-powered Cronos failed and was repaired under warranty, with shipping costs and a long wait. Others describe broken setting mechanisms or rough crown operation. Several owners report PT5000 watches that have worked well. The reports show how a fault and its remedy can affect an owner. They do not tell us whether a PT5000 is more likely to fail than an NH35, because we do not know how many watches of each type were sold or how many uneventful owners stayed silent.
‘Never hand-wind a PT5000’ is repeated in the discussion, but it is not an established cure. The PT5000 is sold as a movement with hand-winding. Some owners associate winding with faults; others hand-wind without trouble. You should not need a special ritual to use a stated function of a new watch. If the crown jams, slips or stops changing positions, contact the seller during the return or warranty period instead of trying to work around it.
When should it change your decision?
Before ordering, look up the seller’s actual return and warranty terms, including who pays international shipping and where the watch must go. A warranty can still mean weeks without the watch and a bill for postage. If the seller cannot give a clear answer, or that outcome would cost too much relative to the watch, the PT5000 becomes a sound reason to pass. A local movement replacement may be possible, but do not assume the parts and labour will be economical.
If you do buy, check the crown, winding, setting and timekeeping promptly while a return is available. A coarse feel alone is not a failure diagnosis; a crown that will not operate as intended is a reason to raise a claim. The honest verdict is conditional: the PT5000 offers a tangible design benefit, and the owner reports justify checking after-sales support. They do not justify calling every PT5000 watch unreliable.