This holds are interesting and can definitely be used as crimps but I think there are better used as feet.
The brain coral does give you the ability to find an edge and bear down this holds are just a tad awkward to hold on to. They make amazing feet that can be used in a pretty good range of angels.
I wouldn't recommend this holds for a homewall unless you are looking for some weird, unique crimps or footholds. I would say the uniqueness of this holds makes them worth getting.
Comfortableness/Ergonomics of the holds: 3/5
Balance of Lefts, Rights, and Ambidextrous holds: 5/5