I haven't tried them myself but since they are the succesors of primotestons they belong to one of the best brands of test. Cid Co produced the primotestons under the licence of Schering but Schering dropped out and Cid Co continued the production
Hell who knows why Galenika Test enanthate or Testex cyp are best in the world? I guess they use good raw material, noth companies doesnt buy it from China for sure, companies are quite big to make it on their own. Cidoteston is what used to be Schering Primteston in the past, CID was making Primoteston for Schering before but since lecense expired they strted to make same drug under their own name. I dont say its bad, just saying there are some other brands that are definitely better.