Handy for tripod work; can't fault it functionally, and accurate enough when checked against another level. Twin hot-shoe mounts mean a third axis level is not necessary.
Beware though: I chose this one partly because the Amazon picture showed the block had ergonomic bevelled edges, unlike some cheaper ones. My example, although in Hama-branded packaging labelled 'Made in Austria', has unbevelled edges. Acceptable despite this, but four stars only.