I received my D35 in May of 2020, so far I have about 2500 km on the bike and it has functioned very well. Really happy with the bike. It is wise to keep an eye on tightening bolts and performing your own general maintenance to ensure that the bike performs well.
You can say this about all bikes, but ebikes even more so. Utube has a wealth of information on maintaining your ebike and is worth checking out.
Overall a solid purchase.