I actually only used it once, during the training session. However, I've carried it multiple times in the snowy mountains, so the storage bag shows some signs of use. I believe a probe is essential for the snowy mountains, and this product is made of carbon, making it lightweight and compact, which I think is great because it doesn't feel like a burden. If it doesn't fall on a weekend or national holiday when the post office is closed, I think I can generally ship it within two days.