That kinda depends - IMO there is no single quality standard that I expect - instead, it is based on a number of factors, including the price, popularity, and the manufacturer's claims.

Generally speaking, the higher the price of the kit, the higher I expect the quality to be. To some extent that will still vary, because I would consider it fair to pay a higher price for a kit that will sell fewer units than one that will be really popular, without expecting that higher price to necessarily include higher quality.

Also, if a manufacturer tries to convince me that his kit has certain level of quality, in order for him to get the sale, then regardless of the price I pay, I expect the quality to be exactly as described.

Then there's always the question of how mature the design is - if I put my name down for one of the very first batch of a given kit, then I expect a slightly lower level of quality than with a more mature product - I am consciously making a decision to accept that possibility in return for getting the kit several months earlier than might otherwise be the case. That doesn't mean I'll acept junk - just slightly reduced quality.

Another thing that I consider to be part of the "quality of a kit", is the quality of support that I get when I have any questions about it during assembly. I expect to be able to get to talk to a knowledgeable person within a few days, max. I don't care whether that means calling a foreign country - I just don't want to wait too long for the answer.

Gordon