The transportation was perfect and timely, and there was time to do everything: Aiguille du Midi, Glass box, train to Mer de Glace, visit the ice cave and a short visit to Chamonix (it was a week day, maybe it's different on the weekend). The tour guide was also very gentle. The glass box was no such thing... you have to wait at least 20/30 min to take a picture there for 30 seconds, and the view is much better without a glass in between. But since you are there, I guess it's a must-do. And finally, about the glacier Mer de Glace, you may think it's far, but it's actually covered in dust, so you do see it very close to where the stairs are. It was interesting to visit the cave because you could touch the ice walls and see it from inside, but it's crowded and doesn't look natural. The best of the tour is the cable car to Aiguille du Midi, and definitely the views from the many terraces. That's worth the value of the whole tour! and also the views from the train to Mer de Glace.

Everything was just perfect, very fun, and meticulously planned out. Sufficient free time except only at the very end when we were slammed by a torrential rainstorm. We were warned, tho! Our guide, Normands, was funny, helpful, and a great guide. The driver Mario was exceptional.

Really great trip, aiguille du midi is awesome and not to be missed. Mer de glaci is equally impressive and the ice caves are fantastic. The trip is not a guided tour so you are given tickets for everything, maps and all info and left to your own devices which is much better. Only downside is mer du glace is a bit rushed. The trip really needs to be a bit longer as it isn't really possible to se the ice caves in the one hour their timetable allows. We ignored the recommended timings for the train and got a later one so we could visit the caves properly but did only just make the bus back - I'm not sure it would have waited as they didn't seem to be checking who was and wasn't on the bus! All in all I'd definitely recommend this trip, expensive but we'll worth it.