I've been a regular (monthly membership) at Barreworks for over a year. And so far, I'm not bored yet!
I've taken classes with pretty much all their Barre instructors and they're always super upbeat, motivating their students to continue to move throughout the 60 min. class. Different instructors have their own teaching styles and moves, and they change their music playlist and exercises time to time, so it's never the same.
Both Yonge & Eglinton and Queen West studios are clean and their staff/instructors are very friendly.
With the monthly membership, you get access to their Barreperks (Mendocino and Kupert & Kim discounts are my favourite).
I've tried another Barre studio in Toronto and it was incomparable. The class I tried at the other studio was not challenging at all, and what disappointed me the most was when the instructor had to look at her notes to see the next set of exercise.
Although Barreworks is a bit pricey, I still highly recommend this place.