They are pretty strong compared to pentyl, and the "effect" is very different, it goes straight to the head, quite similar to the old (now banned) poppers with the added benefit that the Scorpio(s) do not leave you with a headache at all. The European brands that you import (not the pentyl, the other ones, e.g., the yellow rush, isoblue, etc) have a very harsh smell and they leave you seeing a sort of greenish+yellowish ring for a couple of minutes ( I imagine the rumours about them affecting eyesight are true). The Scorpio poppers have a similar eyesight effect but 100x milder and it also lasts one minute tops, so little that I honestly don't mind, especially when I take into account their awesome strength.

The Emerald has a very nice warm smell, that one would think makes no difference but it is actually very pleasant. No difference in strength between the two "flavours" in my opinion.

I would buy them again, hopefully cheaper!