YuanYuThanks @YuanYu! We're started to tip our toes into climbing and ski stuff, so you'll be seeing more in the near future.
You're right that there are lighter models, from BD and Petzl for example. However, one nice thing about the Speed 2.0 is the low profile, so it fits under a hood nicely and packs away easily. . I've used the BD Vector before and a common complaint is how big it is. For an extra ounce or two, that may be worth it.