I've used SH for a number of years and as a single male it has generated quite a few meets for me, some amazing, some amazingly bad. However, and this is an important caveat, I am very well hung, have pics of myself in action, and have worked VERY hard at generating meets. I have put a LOT of time into it, and the meets haven't come easy, they've had to be earned. So, in conclusion, if I - with those things in my favour - have only had a reasonable time on there, you do wonder about the experiences of other men using SH...my suspicion would be that they wouldn't be crazy about it...
If I have a criticism of the site it's that it seems terribly reluctant to "get with the programme" and make it all about who's hot. Culturally I think it still has one foot firmly lodged in the old-school perception of swingers ie. overweight people in their 50s planning dogging trips, when the world has moved on, and now there are fit couples in their twenties and even teens looking to spice up their love life.
Overall though, the site is at least pretty spam free (which was one of the nightmares of Adultfriendfinder when I was a member there), and it's at least better than many of the sex sites I've heard about.
Very few spammers, not too expensive, improving website.
Bit stuck in the past, too many overweight, 50+ couples on there if you're looking for really hot people to hook up with, like all sex sites it takes some serious work to generate meets.
9incher does recommend SwingingHeaven to friends/family