Redline is the cleanest gym I've been to in Boston. Dave Ginsburg is the BJJ coach there now, and when he joined, it made a good gym even better. I don't like the roid rages at the other gyms and they have a student discount, so I pay about $95/month to take boxing with Lyle Lashly, kickboxing with Marvin Perry, BJJ with Dave Ginsburg, MMA with Lefty Rosado and a cross fit class too.
Not only that, but there are now 3 wrestling classes a week!
On Friday and Sunday, local amateur fighter Jeremiah "Dr Doom" DiRuzzo teaches a catch wrestling class. He's wrestled freestyle for 6+ years (jr high + highschool) and has 4 years of Greco under his belt (college). And on top of that, he's spent several years training Catch Wrestling, BJJ, and Sambo.
He does a great job melding techniques from the various disciplines he's studied to compliment one another. He teaches you to shoot, he teaches you to throw, and he teaches you to use one to set up the other.
Johnny Bravo (yes that's his real name), who has been teaching wrestling for almost a decade, and training for around 15 years, has a Freestyle class on Mondays. It focuses solely on the fundamentals, which newbies need to learn and veterans need to hone.
As joejit mentioned, David Ginsberg has been an amazing addition to the school. Aside from the fact that he's a spectacular coach with an amazing knack for detail, he's also a number of his students to the gym as well. His brown belt, purple belts, and blue belts create an awesome infrastructure, so it's not like the jiujitsu program is just a great teacher + a couple of MMA fighters + a ton of newbies. Redline has essentially taken an already-established jiujitsu program and injected it whole right into the gym.
Between the Sanda, Boxing, Brazilian JiuJitsu, Wrestling, MMA, AND crossfit-style conditioning classes (which are offered 3 afternoons and 4 nights a week), it is a COMPLETE program.
The only downside is that there are not many fighters, as it is a new gym, but that can also be a good thing in that you won't get the cold shoulder just because you're not a famous pro -- something that's known to happen in other gyms.