In regards only to the video of their debut song (the first time I've ever listened to them); the girls were way better than I expected them to be, but that particular performance was made less enjoyable for me when it felt like they were all trying to pull off (awkwardly scripted) little vocal tricks too often or overtop of one another.
The "Seasons of Love" was much nicer to listen to (a couple of times ), but still not quite..something.