This is the only place I'll go to get my eyebrows shaped in Boston. I'm surrounded by a plethora of other threading options and I still trek 30-45min to come here. Ranju is truly a brow virtuosa who can work her magic! She makes the experience pleasant and she actually listens to what you want. If you ask her not to change the shape, or not to make them too thin, she'll simply clean them up. However, my advice is to let her have at it and perfect your brow shape!
Listen to her - if she tells you to grow your brows out, try as hard as you can to leave them alone. It took a couple visits (and loads of self control), but now my brows are PERFECT. I've been complimented a half dozen times in the past 2 hours while running errands. Ranju really understands how brows can create visual balance and enhance your natural beauty. She's meticulous, gentle, and doesn't rush you out (even when there's a line of customers).
I'm very particular about my brows as I am a firm believer that they frame one's face and can dramatically change how one looks. I can't recommend Boston Threading enough. Check this place out if you want perfect arches!
P.S. I've had my entire face threaded twice now and she does a great job - got every single hair, no traumatized/cut skin (surprising how dangerous threading can be), and extremely gentle. Great, affordable prices. I recommend going during the day or making an appointment if you plan on going in the evening for a full-face threading. She's a one-person wonder and definitely worth a visit!