Chemone is decent, though they use a suspension method which while tasty reduces research efficiency.
Researchstop is solid.
UP, unfamiliar with their products... however have issues specifically with caber, selegiline and several other products manufactured in india. these raw materials have been tested and are not adequate. there is only one company in china that makes a passable cabergoline crystal, and its still not comparable to dostinex/cabaser made in europe.
ag-guys... quality control and other issues. not to mention over priced... this company went way down hill after transfer of ownership a couple years ago