I've ordered one today, because with codes it came to £71, and it will fit onto a set of Leese carbon cranks I already own, and it will look better than the alloy spider they came with.
I'm fine if it turns out a bit crap - I already have Assiomas that I know are accurate - but I can to see a point in adding to my winter bike / gravel bike that wouldn't otherwise have a PM.
If I'm trying to gauge exactly how hard I need to push for a time trial, accuracy is paramount. If I'm trying to measure TSS on a winter club run so I know how hard I should or shouldn't push on the next days turbo session, being in the right ball park is OK.