If they prove accurate from your rifle -they do out of mine- they are well worth using (1) if you get frequent ricochets off hard/stony ground, and (2) if a .22LR is the only option for foxes in a given situation. IME they segment reliably and each of the 3 shards creates a lethal wound channel of its own.
If you don't get frequent ricochets, and only shoot bunnies, and need to watch the pennies, however, stick to standard SS HP.