The elephant in the room is price point. You want specs, OH, and they ARE out there!!!! These options offer amazing price/performance. But you can't expect...
Service? Well,
CSC might have brick and mortar showroom depending on where you are, and people are finding surprising sources for low end bikes.
GPX is responsive if you are near the shop, and
Lifan works through shipping and advice. From my experience, so does PSM.
But nearly all of these options leave most of us on our own for wrenching.
So what do you want? Service guarantee is not there. We accept these conditions for the exceptional low prices we pay. For the knowledgeable wrencher, this is nothing short of GOLD. For the novice, it is a crap shoot, and long term mistake. This is the unfortunate reality, or fortunate if you have tools and experience