Yeah, I was actually a little surprised by how much effort they had put in to offer something new. Most DLC's should be free, lets face it, especially games like Burnout - but I don't feel hard done by after buying and playing through LaD.
The missions are usually quite different to normal GTA and riding round in a gang, surprise races, and gang wars are great fun. It's a no brainer really, if you like GTA then you'll like LaD.
There is one slight niggle, and that's the bloomin arm wrestling. Seems to be there to simply feed the player $100 every minute or so, but I'd rather have a challenge, maybe a record to aim for. See you can just stand around arm wrestling all day earning money with no effort - a blind goat with brocolli for an arm could win. I'd rather have seen the difficulty and money ramp up, and it being limited to only giving money once a day. I don't want to sit, wiggling my tumbstick for $100 bills like some haggered old prostitute.
I predict that the next DLC will have you play as a cop, which I think would be great fun, actually running around with the law for a change instead of from it. I have quite a risky bet with my brother on this, if the next GTA DLC has you playing as a cop then he buys it for me, otherwise I buy it for him. I guess it might be a little lofty of me to wish for an online co-op mode.