I have a standard S8, bought outright and gave the perfect S7 Edge to the lady wife.
The S8 (cased from day one in Samsung's remarkable LED case, I still don't understand how it works!) is a decent phone, does everything that the S7 Edge did, with just a little more polish.
I don't feel the need to use any of the biometric security features, the novelty wears off in seconds so a PIN will suffice, Likewise the Bixby idea follows the Google voice control into the 'i'll not be using those features bucket'. I take the view that with a yearly product refresh pressure that Samsung must be desperate to find something innovative to differentiate the new model.
The S8 is a bit odd at first, especially as it feels smaller than an S7 Edge, and yet the display is usefully larger. I saw an S8+ in the Dixons duty free store in T2 at Heathrow on Monday, crikey it's huge - a phablet for sure.
Battery life is good, better than the S7 Edge, especially with the sophisticated power management features turned on (which reviewers never seem to mention).
Yeah it's pricey, but most decent bits of technology are. No regrets.