http://www.lomasdelvolcan.com/
Nice place. A/C in the rooms, views all around. Had a couple of nice cigars each night in the bar, just a small place, but open to the volcano side of the resort. Pretty good food, too.
We saw the major volcanoes (Poas, Aenal, Irazu) but every one of them was shrouded in cloud, mist and fog. We went up to Irazu, but the weather was too nasty to see much (about the only time the whole trip weather interfered with us). It was cold, wet and unpleasant, and I was worn out from work and traveling and just needed a nap back in the nice, warm bus, where I returned.
I've flown in a helicopter over the only active volcano on the big island of Hawaii (and I've driven into the park there as well), and I've experienced ash fallout from my own home state Mt. St. Helens, so I didn't feel I was missing out. The sourrounding area, like much of Costa Rica, is also quite beautiful.