Our family was able to do the 60 - 80 minute tour which was for us alone. The price was reasonable given what other caving experiences in many other countries have cost us. Our guide was knowledgable and engaging. We loved that this is not a "tourist" cave in that the inside hasn't been developed with concrete paths etc. Our only downside was that due to our timeline, we were unable to take part in the 4.5 hour experience. We will definitely return to Slovenia for this opportunity!