Really very well thought! the tips inside allow to avoid losing them or always ask where we put them (for a husband a little in the moon, it's perfect!). The battery holds long and totally recharged in a few hours (I'd say about 3 hours). The only flaws: the tips are somewhat fragile and if we do not stop screwing quickly enough they can wear out (but they are replaceable prior); Moreover, the button to change the direction of rotation is a little too close to the index (with a risk of unintentionally push it), so be careful. But overall it's still a very good product, quality and easy of use for all small crafts!