Kurt, I think he/she means that he/she has read that article already but wants some clarification.

I would say that Ranitomeya imitator is the best or joint best thumbnail dart frog species if you've never kept thumbnail dart frogs before. The other would be R. ventrimaculata (I just got my first "vents" on Saturday actually). However, thumbs are more delicate than larger dart frog species like tinctorius/azureus, leucomelas, auratus, terribilis, etc. When I say more delicate, I mean in comparison with larger species they do not tolerate problems to the same degree - humidity issues (i.e. not enough humidity), food issues (wrong food, too much food, not frequent enough feedings), temperature issues (sudden changes in temperature, inconsistent temperature). So if you've never kept dart frogs before, there will be a steep learning curve. If you want to attempt it, I say get your research done, prepare you terrarium, plant it, secure your fruit flies and figure out how to culture them reliably (we have a great article on this), etc. Get set up at least a month in advance. You don't want to pay out several hundred dollars for a couple of tiny frogs that drop dead on you in the first week or two because of beginner mistakes.

I dived into thumbnails within a month of acquiring my first darts. I was lucky though - I had a lot of experience keeping other frogs for many years, I was also familiar with dart frog requirements, and I was fortunate enough to have some dart frog hobbyists be kind enough to show me their setups and give me lots of tips.

So anyhow, I don't want to put you off trying these frogs - in my opinion, once you have the basics down, they are among the easiest frogs to keep, certainly among the easiest to breed and definitely among the most beautiful. They're pretty cheap to feed too, if you culture your own fruit flies (which you really have no choice but to do).