I have to say that I have rarely had any problems with parts supplied by any of the main players in the classic Mini industry, with one exception who I won't name at the moment.
But I never go for the cheapest if there is an option.
I do buy Mini Spares own stuff and apart from an oil pump problem many years ago I have had no real issues.
If anyone has a problem with a part from an established supplier then discuss it and if not satisfied with the response then come on here as we all need to know about it. So long as your report on here is factual there can be no adverse come-back
Let's name-and-shame when necessary.
I totally agree, I have also bought from Minispares since 1980, I have only had a couple of problems but they resolved them even though the (new and unused) items were no longer under guarantee.
There is obviously a lot of cheap rubbish on the market and the buyer is always looking for a bargain. Occasionally and unfortunately these items are also sold by the the Main Mini stores but from my experience, they are very helpful in resolving these issues.
Naming and shaming should only be done if we are also willing to praise them for the excellent service and parts supplied for 99% of the time.