This series has waited over 30 years to be released. I recall seeing odd episodes at the time ( 1977 ) and being impressed. The long wait has been the subject of quite a few forums. I had given up waiting for it, then bosh, it was released. The quality is fine, the pace is a bit slow by today's standards but all up it is excellent. I have just finished watching both series, one episode after another. Interesting to see the stars still around today albeit in more mature age roles. Some might find the regular switches to the home front detract from the action, the series suffers a bit by obvious budget constraints but the flying scenes are excellent.
Worth the wait.