Sean Patrick Flannery is likable and does a good job as young Indy. The series suffers, however, from bad editing and sluggish pacing.
It's interesting to see the guest appearances...especially by Ian McDiarmid and Christopher Lee. And I think Carrie Fisher actually wrote the episode with Mata Hari.
It's worth seeing, though I think a lot of people simply wouldn't have the patience for it.
They need a good edit.