I'm sure it was fun to fly.
However it missed its market in the usual Lockheed way (L1649, Electra, Tristar all did in turn) and was a prop when the market wanted jets. It was the only mainstream turboprop a US manufacturer ever designed. Got relegated to decidedly short routes early on which it was really too large for. Made a good freighter afterwards but there were more frames around than takers.
the ideal aircraft of the 1950s-60s would have been :
- designed by Lockheed
- assembled by Boeing
- sales and marketing by Douglas