I liked TT simply because they had the best overall item selection, plus they were pioneers(as Mexican Vet Companies go anyhow) with items such as Equipoise 200, and Deca 300. Up until Ttokkyo coming out with the high-dose vials, the highest dose I ever saw on those 2 items was 100mgs on the EQ and 200mgs on the Deca. They were the first to manufacture d-bol & Winstrol (winny) tabs in high-dose ratios as well. Right around the time the Ketamina busts went down, they had just released Primobolan & Test Suspension and were in the process of releasing Masteron as well. You have to respect them for those things. Others were simply following, although some of the same products they followed with were of higher quality. However, most of TT's stuff was of high-quality in my opinion, with only a few items being on the cusp of low-medium quality. Those being the Testonon 250(it was real Sustanon (sust), but HURT), and the Anadrol which was also real Oxymetholone but for whatever reason, didn't result in gains like Euro brands. I can personally say, that I loved TTs Enanthate, Propionate, Cypionate, Winstrol (winny), Eq, and Deca(even though I usually HATE Deca).
As far as the rest, they have their good & bad. I agree that Loeffler is probably the compnay with the lowest consistent standards of low-quality though.
Denkall, which is considered by many(for what reason I don't know) to be the best Mexican Veterinary Company, has a few items in their lineup that I would consider to be completely worthless. Those being the T400(OMG, the pain). The new(er) Aqua-Test(for the same reason), and Denkadiol.
Loeffler being of low-quality(as was stated) has a decent item in the 5mg Anavar (var) tabs(Oxyfort I think).