Hey there,

Just wrapped up a 2 day stay at Tabacon.

We left Andaz Papagayo around 8 am on a Saturday and made it in about 2 hr and 30 minutes. We did this for a couple reasons the first was to get some extra time in the springs and the other was to avoid the traffic entering Liberia and turning onto Inter American Hwy. 1.
The roads are paved for all but two stretches of a few miles each. These parts are by the wind turbines. Just like other parts of CR be prepared to pass slower traffic along the way.
Arriving at Tabacon around 10:30 am our room wasn't ready yet but they were happy to let us enjoy the springs until then. No real Globalist benefits and they did offer a paid upgrade of $200 USD per night for a Tabacon suite, which we accepted. Probably wouldn't do this again.
We also had to pay a 3rd adult fee for our teenager with us.
Had lunch on the springs side, nothing to write home about but was good.
Our room ended up being in building 6 which is convenient to the lobby but had a pretty average view. I believe building 3 has the volcano views. I did see a monkey within the first hour from the balcony and the highlight was several Toucans the following morning.
Breakfast buffet is free for all guests and was good. Had a omelette and waffle/pancake station. Be careful they had 4 types of syrups for the waffles/pancakes and I poured what I thought was maple syrup on mine which turned out to be honey. That wasn't a good combo.
Outrageous mini bar prices so stock up at the first mini mart on the way into to La Fortuna. It will be on the right. There is also an incredible spot right next to it to get pics of the volcano. You'll know when you see it.

If you're strictly heading to the area to enjoy the springs, I think 1 night is a sweet spot. I would recommend doing what we did, arrive early and stay until room is ready. Head back in the twilight and transition to darkness, then come back the following morning during the hotel guest only time between 8-10 am. I felt that was more then enough time to experience the springs. Of course if you plan on doing more stuff in the La Fortuna area then you'll probably need more then one night to do it all.

Overall I think it's a one and done experience but wouldn't hesitate to recommend.

If you have any specific question, I'd be happy to answer them.