Not a fan myself... but of the establishment people running him and Beto are probably the only ones I'd vote for. Biden, Harris, Booker are all on my abstain list.
I don't know whether they're go left on things that matter to me like single payer/universal healthcare, but I hope their 'youth' and the public popular opinions would possibly sway them to be more progressive if that's what the country wanted.
Biden, et al I feel are much more entrenched w/ the establishment and would not budge at all and would kowtow to insurance and big-pharma.
Of course I'd much rather see Bernie, Tulsi, Warren, or Yang succeed.