NO!!! Don't do it! It sounds like a good idea, and an easy way to make some cash, but...
I signed up for it in my first year of uni. First of all, there's loads of paperwork, and they make you pay to hire your 'kit' (basically loads of sex toys and clothing), which is very heavy, and you have to hang on to yourself. Now, I didn't drive, which made it very difficult to get to places, and carry the kit around - if you drive, it'd be much easier.
First, I had a meeting with my rep, who gave me my kit. She was really miserable, not at all what I was expecting! Plus, I was supposed to attend a meeting every few weeks at my 'nearest' centre, which happened to be about half an hour away, and again not driving, it was pretty much impossible (and expensive) for me to get to.
On top of that, they really do expect you to organise your own parties, and if you don't get any, you still pay to hire the kit. I was too embarrassed to hussle my friends into booking parties, and also in my first year, I didn't want to get known as 'Ann Summers girl'. So, I did a party that my rep had organised, and it was really, really horrible! (btw, I'm not saying it's like this for everyone, but you asked for anyone with experience of it). Basically, it was in this town about 50mins away from me, I had to get my then-boyfriend to drive me, and we got totally lost. Eventually, I found it, it was in this working men's club. I had to then walk through the bar, still full of the working men, who were all either leering or making nasty comments, because they'd been told what I was there for! I then got ushered into what was essentially a conference room, where a bunch of increasingly drunk older women either heckled me, or tried to steal the products!
It was exhausting - 2 hours spent trying to keep them entertained, and get them to buy stuff. In the end, I think I made about £70, but some of that went on the kit, and if I'd had to pay travel, it would have been even less.
So...eventually, I decided I'd had enough. It wasn't suited to me, and so I called my rep and said I wanted to quit. She was really, really difficult about it (because she got some commission off my sales), and messed me around, and after the initial call, she no longer answered my calls! There was loads more paperwork involved in quitting, and then the return of the kit. That was the really tricky part. I had to arrange for a van to pick it up, but as I lived in halls with a broken buzzer, it was impossible! They had this rule also that the driver themself wouldn't call, but some guy at the depot would! So, we tried three times to drop it off, no luck. The next time, I asked to be called on my mobile and I'd come down and drop it off. I ended up being in a lecture at the time, so had to leg it halfway across campus, and by the time I got there, the van had gone! They kept trying to charge me £500 for it (which is probably why they were so unwilling to pick it up). I offered to drop it off at the depot, and they got really shady and said it wouldn't work like that. Eventually, I left it at the main reception desk, and it was taken off my hands. Literally, two of the most stressful months of my uni experience!! I got into huge money problems with it, and felt way too embarrassed to tell my parents.
I'm sorry for the negative view (and essay length post), I'm sure people have had great experiences with them, but it's nowhere near as easy as it sounds, and they will screw you around because you're young, and get money out of you. All the best!