In case you're interested, I went to Harlem Cycle's opening day last Saturday. Thought I'd send you my thoughts in case you wanted to share more about it, or check it out yourself.
It's small, and the teachers seem great. The studio is welcoming and the bikes are good quality. At $25 a class (with discounts if buy packages of classes) it's less expensive than other boutique studios in the city.
Still, if you want to take several classes a week it can add up. It definitely has a Harlem vibe, which is a plus. They have a reggae spin on Friday evening, and a Gospel spin on Sunday morning. And different classes are named after the area. For example, Sugar Hills and Strivers Row. They offer more interesting classes than most spin studios. They have your standard 45 - 60 minute classes, but also offer classes that are cardio on the bike, and then strength training, or pilates, or yoga.
I think that it is absolutely worth checking out.