Awesome DLC. It gets a tad bit repetitive, but it's over before it gets too bad. Definitely worth the $5 for me.
The ending bonus is awesome if you get first place for all the challenges. SPOILERS
: You get a little apartment on a nearby planet, and you can buy weapons from a computer, no matter what your level is. I started a new save for my 12th playthrough, and I'm at level 39. But I got a Savant X Biotic Implant (the best one in the game), Colossus X armor, Spectre Gear HMWSG X Shotgun, and a Predator M X Turian armor. And you can't even find those until level 50 I believe, so Pinnacle Station is a fantastic way for lower level players to get some great gear. SPOILERS OVER.
I was too busy staying alive to take a screenshot of it, but the very last Survival Mode mission in the subterranean level is INSANE. At one point right before I died, I was fighting off 3 Geth Primes, 4 Geth Juggernauts, and 6 Geth Destroyers. Woah nelly.