To respond to the OP, I have a Mammut Lucido TR1 (the lantern/headlamp combo) that I really like. It's my wife's favorite of the three we have (the others are a BD EOS (the newer model) and a Petzl Zipka XP). From using it, the lantern attachment is a useful option and spreads a nice light in a tent, but I prefer it without it.
The beam the Lucido casts is one of my favorite beams I've ever seen — it casts a wide, even circle of light that is unbelievable for finding your way in the dark for navigating a rough trail or searching for firewood — applications where a lot of clean light is needed — this is superior to either of the other headlamps. It's just a very different beam pattern. It's got no real hotspot in the center, but is even across a wide, very useful area, with almost 100% falloff at the edges. Everything is either lit well and evenly, or not lit at all.
My wife also finds the headband to be more comfortable than the others we have. I don't think the headlamp feels as rugged or durable in terms of build quality as the others (the EOS in particular), but I haven't tried it in rain or any other rough conditions.
If I had to depend on just one light source for a trip, I would take something else, but with two of us hiking, this is a no-brainer to bring along; my wife gets this (I take the XP, usually using the red LED) and I borrow the Lucido when it's time to hunt for firewood, for instance. And the lantern feature is a nice option for the tent.
Overall, I consider it a good value, and I would purchase it again.