Personally ? No. I don't want any gun safe that requires electricity for me to get into. Power goes out, batteries go bad, electronics fail, etc. Gimme a key or combo any day. Also, what if you cut your finger ? Or similar ?
That said - if you're locking up a home defense weapon for whatever reason that suits you (kids, etc)... I can see a biometric safe being a possible thought. Still don't like it, personally.