UGL for injectables for sure which is neither here nor there. As there are top shelf UGL's with supreme quality and there are UGL's that are pure shit. Educating yourself is the key. You should be reading all the pages here on each verified source every post every comment so you can see for yourself who has the trust and the solid repeat customer base.
You then go with the one you are most comfortable with.
Yup that's about it