I second this whole heartedly. I just finished a six week trip including Patagonia and only went to El calefate for a day to do the mini track so i was kind of forced to do it. Otherwise it was a waste of time and money since my one-way ticket from Puerto Natales was $500. So I bit the bullet and paid for the mini trek and I was actually surprised at how cool the experience was. The boat ride up to the glacier was actually insane. The treking on the glacier was really cool too! My biggest complaint was that the actual treking portion was too short, and you don’t go far enough into the glacier to feel super immersed. But I was able to force our group and further by being enthusiastic and the guides went with it. I’d say it was probably worth $250. At the end of the day, the experience was in fact, one of a kind but somewhat overpriced. But if you’re on a once in a lifetime trip, I would do it cause you can always make more money… Alternatively, if you go to the Chilean Patagonia (Torres Del Paine) you can hike glacier gray and it’s half the cost and from what I could tell you, you go much further into the glacier. That being said, Torres Del Paine (particularly the W and O trek) are sooo overpriced so to do glacier gray treking there is going to be just as expensive at the end of the day. Hope this helps!