Bither is a well-designed multisignature wallet for Bitcoin (BTC) only. The user's security and privacy are improved in contrast with other products on the market, the user experience is good.
- improved security (HD wallet, backup option, multisignature support)
- improved privacy (use of SPV servers)
- static fee suggestions (users can't influence fees)
- no option to set up a two factor authentification
- Segwit support is announced, but not yet integrated