Singing and dancing:
Songs are lip sync I think, but still a lot of fun.  Miss Dream and Over the Moon is beautiful.  Triple Dreams is awesome because you get the bad guys, Outers, and Usagi/Mamoru singing different songs at the same time.

Important Actors:
Anza and Morino Ayako (First Stage Moon and Mercury).  Introduces Takeda Keiko as the First stage Saturn (except for in Eien) and Saitou Rei as the first stage Pluto (except for the first Pluto who was never on tape).

The Senshi in this musical are known as the Moon Lips.  They sung the opening song to the Sailor Moon anime for the S and Super S season I think

Chibi Usa was double cast (two actors played her)

Mochizuki Yuuta plays Tuxedo Kamen, King Endymion, and Dracul.  He also was Kamen Rider J and Tyrano Ranger in Zyurangers.  He's also one of the F4 in Hana Yori Dango

Kasahara Ryuji plays Tiger's Eye as well as a million other enemies in Sera Myu as well as Silva in the HxH Musical

Enomoto Yuuta does the voice of Pegasus, he also plays the Shin Densetsu's Tuxedo Kamen

Bad:
No Saturn, No Nehelina, Ending is kinda funky.  Songs are lip sycnced

Good:
Great camera angles, a lot of sfx including henshin scenes.  The circus portion includes a bunch of tricks (magic and stuntwise).  Introduces Hotaru for the first time.

Bonus:
Includes the bonus footage that only came on the LD.