... but not one of the best. It feels rather like how Slam Dunk!, but in the drama + shoujo + romance genre with a focus on acting, rather than a comedy + shonen. The fact that I like Slam Dunk! better probably has to do with 1) the art style, and 2) the genre.
It reads like a classic, and it certainly looks like the older type of shoujo. And the art does get better, though not so much as you'd notice the shift without direct comparison. However, it does get incredibly repetitive and predictable. Eg,
Masumi's BOUND to think "Maya...!" several times over the course of the play. And it was obvious that she's going to hate him then fall in love with him from the moment she learns he's supposed to be cold-blooded. Etc.
Also, people's attitudes don't change realistically.
Maya manages to get the audience choice award on a solo play in a national competition, and then wins 2 of the most prestigious awards (on a national scale), was EXTREMELY popular in a popular TV show, had her face plastered all over the place in advertisements for a huge company... etc, etc, etc. And YET! Other actors, producers, directors, etc, (not even counting the general public), STILL don't know her face or her talent! She's the only rival a renowned genius actress acknowledges, they've always had a pretty good relationship in public, and still people try to kiss up to said actress by dissing her acting. What the hell?
There's also a LOT of dialogue/narrative/conversation.... whatever you call it. In other words, it's text-heavy. I don't know about everyone else, but I expect more pictures than text in my manga. If I wanted text, I'd go for a book instead.
For those who would compare this to Skip Beat!... there's a lot more focus on the actual plays she does - you get the entire play, with most of the dialogue, when they perform. Which could be nice, for those who're interested in the content of the play, but personally I think it breaks up the flow of the story too much. It's not like the actual story is going to affect Maya's growth as an actress that much. Kyouko's growth as an actress is also more obvious - in Glass Mask, you get told again and again that Maya's acting isn't polished enough, but is strangely attractive... and that never changes. She learns how to portray each character, but there's no sign that she applies whatever she has learnt to new characters.
By the way, the romance in this one... is the frustrating type. You'd just wish they'd get together ALREADY and save everyone (including the readers) a lot of pain. (In contrast... Kyouko's reactions makes the Skip Beat! situation a lot more fun.)