For cold weather? For strong wind? For melting snow? No, I wouldn't recommend a hexamine stove for those conditions or applications. For *all* conditions, hexamine just wouldn't enter my mind.
For "fast and light" fair weather trips? Sure. And it'll do a danged good job. I consider hexamine to be very competitive with alcohol stoves, although alcohol will burn much more cleanly. Hexamine is nice in that it's very easy to see how much you're using and that it can't spill.
The place where I see hexamine stoves having a real advantage is in their stability and "shelf life." I carry a hexamine stove in each of our family cars and my office BOB. The fuel is very durable if reasonably well packed. It won't leak, it isn't volatile, and it will last for years. Hexamine stoves are light and compact which, when combined with their stability and good "shelf life," makes them ideal for caches, cars, office BOB's, etc. Just
make sure you pack a good wind screen with them.
HJ