The details of Masterbox figures are very good and fit is generally excellent for plastic figures.
You can get Masterbox figures from Amazon…not the cheapest price, but factoring in free shipping for Amazon Prime Members, the price is competitive.
I can understand the complaints as Masterbox kits do rehash some of the same parts for each kit and their gear can be somewhat boxy; however, that seems to be changing with their latest kits adding more deeper clothing wrinkles and the gear not as boxy.
I think one issue with Masterbox figures is that they tend to be on the thin side compared to other 75mm (1/24) scale figures. Resin figures tend to be more beefy and wider. The height scale is correct for Masterbox figures, but the width of Masterbox figures could use some more “muscle.”