We stayed at Popps last summer, if you like very rustic, very old Florida it's ok. We just came back from our summer trip this year, and stayed at the Continental Inn. That is in Marathon, only a short distance south of Popps. I very highly recomend this place. Beautiful clean room, full kitchens. This will be our place to stay in the keys from now on!! Hope this info. will help you out.
ps. price is almost the same!!