First two seasons were excellent, 9/10 for acting, script, graphics, everything, just not a 10/10 because of the low-complexity family-friendly "inspirational" drama and the extremely annoying non-robot villain.

Then for season 3 they mostly ran out of interesting space-travel and tech problems to solve, and also ran out of family-friendly cliches to throw at us, so it felt like a big quality drop from the first two, especially the second half of the season.

But overall I'll still put it at an 8/10, still a lot to be enjoyed here and worth getting into for those who haven't started watching it at all.