Well, if the money isn't too big a deal, I have to highly recommend getting it. It was really quite, quite enjoyable and very well done.
I would put it on par with Shadow Broker in both quippy, memorable dialogue (both active, personalized in-mission dialogue and banter by and with your squadmates, and awesome lines from the whole crew when you visit them on the Normandy in-between the combat missions) - and in a range of beautiful and unique settings and combat options.
The more I think about it, yeah, it really is totally worth it. Not worth playing through the end, mind you (you can see the additional dialogue with the StarKid on YouTube, it's all of 20 seconds worth), but worth it just pick up and do from any save pre-Cerberus HQ (probably the later in the game the better for full dialogue value) and to have to do in any future playthroughs.