Simple and nice design; especially spot-on is the periodic table look & feel which is visually easy to remember.

One thing that's a little odd is that from reading the site's content marijuana looks like a 100% perfect drug. I was expecting to find a section about undesired side effects, ideally for each strain, and particularly related to long term usage. E.g. I've heard pot users say that in some occasions they experienced paranoia, or mild depression.