Agreed on the dialogue, the back and forth between Shepard and Liara, especially on the hull of the ship was excellent, but I brought Garrus and Tali along as well. It's a pity Bioware couldn't have brought back the voice actors for those two as well, given the history all four of them share.
The Shadow Broker itself was excellent, it totally lived up to the mysteriousness of the character that had been built up. It can be hard for games/tv/movies to have characters like that live up to the expectations that are built up in the journey to reach them, but I definitely think Bioware delivered.
I didn't really have a problem with the car chase, I only died once or twice and one of those was going the wrong way at the very end of the chase by accident.
I wish we'd seen a little more interaction between Liara and Feron at the end, it was a little abrupt he quickly he left you and Liara to talk alone and just leaves their reconnection off screen.
Seeing another Spectre was cool, I hope we see more in ME3.
I picked up the Firepower pack along with this DLC as I happened to have exactly 160 points left after buying LotSB. All three weapons were pretty good, especially the shotgun, which has a much greater range than any of the other ones and a decent punch to it.
The rifle was better than expected, a semi-automatic battle rifle, it's kinda similar to the burst fire Avenger rifle already ingame, but I found it easier to not waste ammo with the new rifle as if you happen to hit fire one or two times extra by accident, you only was 2 rounds, not 6.
The pistol is similar to the existing heavy pistol, but it felt more powerful and has a few more spare rounds, so it's an easy choice to take over the existing pistol. The only downside it the laser sight can be a pain at longer ranges, but I guess that's to offset the extra punch.
If you have the points for it, I'd definitely recommend picking it up, particularly if you play a shotgun heavy class like the Vanguard.