Waxing is something we'd probably all love to do, as it certainly means smoother, but something we girls can only have done every 3 to 4 weeks. So grow back becomes an issue (most punters want smooth from my limited experience).
Lasering is just down to price, I know getting my bikini line done was £600 alone (totally worth it), but not a lot of reputable places do the whole thing, and does take 6 to 8 sessions. Or if blonde/dark skinned not worth it for the lack of success.