I've never really gone to lapdance parties for the extras, more for the dances themselves, and the HLD party distinguished itself by providing very friendly dances that weren't cut-short. I tried the SVT on two occasions a few months ago, and found that the quality of the dances just wasnt there. I still havent tried the 'new' HLD event, but I hope that this is an improvement.
Also, I never felt that what you get at these parties was comparable to what can be had at conventional strip clubs, as the dances in manhattan clubs tend to be air dances. The atmosphere at the parties is also much better, more loungey and relaxed, with food often provided.