Shamain is good for very traditional outfits from what I've seen. MOST Sabs brides I've seen have looked good, but one of my friends went there and they absolutely screwed up her makeup. She also said it was really rushed and its quite hectic because they overbook.
Sabs is good I can tell you from my personal experience , just try to reach there atleast 1/2 an hour before the time they will give u and u'll be ready in time. Even if they are heavily booked , all the brides are not booked with a single makeup artist , some are with saba some with sonia / kadir.
Shamains is good too but they have become too expensive ...when i was deciding for my shaadi makeup I just couldn't agree on giving away 25,000 just for makeup. They may increased charges even more now. Sabs Rs 18,000 package includes services too.