We stayed 10 nights here and loved it.

Positives:
Our room was large (the deluxe room) and had air con,
The communal kitchen was very well stocked and clean (Fridge, gas stoves, pots, pans, utensils plates, etc.). It was nice to talk with other travellers here each night/day,
The bed was comfortable,
The owner was great, friendly and very helpful in organising tours etc.
You can visit Corcovado from here.
Good location - in town but not on the main streets so it's quiet. 5 min walk to the big supermarket and the bay. The airplanes were really a bother.

negatives:
The only thing that could be improved was the cleaning of the room. It only got cleaned once during our stay. No biggy though.
Be prepared to wake up early because noise travels well in the main part of the cabinas so when someone is awake and talking it feels like they are in your room yelling at you.

Neutrals:
The beach is 40min bike ride away. But we didn't like the beach very much anyway. It's a black sand beach so the sand is scorching hot and when we went the waves were rough and there were stinging jellyfish. We would choose to stay in the town again.

Rooms: Good sized rooms that are pretty basic (no tv) but are very clean, have A/C, and include a dresser/wardrobe (we traveled through Costa Rica and you'd be surprised but many hotels don't even have basic furniture in the room to put your stuff or hang your clothes on at this price point). Bathrooms are also clean and include hot water. I'd recommend you request a room with an outdoor shower if available. Nice experience and no issues of privacy. We paid $40/night for two people in January 2013.

Owner: Mark is very hospitable and a great guy to chat with. Ask him for recommendations and he will happily oblige. He provides guests with a map of the area. We stayed 1 night before we headed out to Corcovado National Park for 2 nights and returned to Cabinas Tropicales for another 2 nights. Mark was kind enough to store our luggage for free while we were away.

Property: Mark has done a terrific job of turning the grounds into a small tropical paradise. Nice layout - when you walk through the front door, you come into the kitchen/dining area. Guests are allowed use of the fully equipped kitchen. There is room in the refrigerator and in the pantry for your groceries. He has flowers and plants running all along the perimeter of the property. Birds come to feed on fruit in the kitchen area.

Location: The hotel is literally right next to the regional airport so it's very convenient if you're flying Sansa or Nature Air. In terms of the main "town," it's about a 600 meter walk so not super close but a relatively short walk. But there are a couple of seafood restaurants that are close by.

Bottom line: While we were on a budget for this trip, we didn't want to sacrifice some basic luxuries, such as A/C and hot water. We were so happy we stayed at Cabinas Tropicales. It's probably the best value for your money in this area.

We read about 'Cabinas Tropicales' and felt compelled to see for ourselves. Truth be told, it's better. The garden is amazing, the rooms are super tidy and roomy. The area is quiet and very down to earth. The kitchen is an absolute plus and meeting point! All that for 35-45$. i've spent some nights in some very shabby places for that kind of money. Plus the owner Marc is very friendly and forthcoming. we felt right at home from the beginning! So much, that we stayed longer than we anticipated! Absolutely recommended! Tnx Marc!

Great place to stay in Puerto Jim. Mark was helpful with organizing our trip, storing our baggage when we went into the park overnight, and a great host while we were there. The shared outdoor kitchen is well-equipped and has storage space for guests' food. Rooms large, clean, and bright, with quiet air conditioning. Lovely courtyard with hammocks and full of plants and birds. I'll stay there next time for sure.