Given Corbyn has survived two labour coups and come out stronger than ever and he has really relaxed into this election because he isn't hiding and doesn't have to; I think he demonstrates better leadership qualities and political resilience than any of the alternatives right now.
I don't believe Labour and certainly not Corbyn & Co are credible when it comes to finances. They just muddle through or list from one disaster to the next borrowing along the way to paper over each crisis. Definitely not credible to negotiate a good Brexit deal, he'll just sell out to staying in the single market at whatever cost.