I would not use it since it is not wallet-less (no direct-payment requires depositing before buying anything).
PGP-only authentication (no username) is neat though.
edit: looks like I'm mistaking, it is used only for refund according to /d/DrugHub/wiki?id=45b4b777 => it looks as good as the 3 other most popular ones.
...the fuck? How on Earth did you convince yourself they are not walletless, and more importantly, how did you manage to have so much confidence in this opinion, clearly based on absolutely nothing, that you felt like you were qualified to give someone else "advice." If you don't know something, just don't talk about it. It's that simple. If you aren't completely sure and you really want to give your input, maybe take some time to look into it BEFORE posting nonsense.
see /d/superlist of which drughub is listed