Literally just finished this series about an hour ago.
Episodes 1-4 (Netflix cut) are a little hard to get into. They're just very cringe worthy. But it's absolutely worth powering through, because--
Episodes 5-25 are absolutely addictive. They're magical. The music is great. The chemistry is sweet and poignant and funny and just 10/10 all around. This whole series could have been a perfect 10 for me except--
Episodes 26-35. They added two ultra angsty, totally unnecessary plots. The sweet romance almost completely disappears. This section is like a 6/10 for me.
36-39 they sort of try to bring back that sweet romance but it's just not the same. The final scene is great, though.
Ultimately even with the annoying ex girlfriend character and the really soul crushing episodes I'd still give this an 8/10. I'll definitely watch it again, just skipping those 10 near the end.