The first thing is what you get free. Well at LiveCamNetwork, like at any good site members can chat with the babes (with their clothes on) free, but must pay if you want to see nudity. Some chicks will tease you a little in the free chat room, but I didn't see any naughty bits until I paid. Once you decide to pay, you now have 2 options: you can join the semi-private group nude chat or take the model into V.I.P chat where it is just you and her. The semi-private chat is a little cheaper, but then you have to compete for her attention with other guys in the room. On the other hand, you can drop out of the competition and just be a voyeur sitting back to watch the action.
The next important thing is the quality of the women and of the video. The models I saw varied from the cute chick next-door type to the sexy wannabe porn star. Like the chicks, the quality of the video was good overall, and there are even some babes that have high-def cams that look even better. Most of the babes also have microphones so you can hear them talk to you while they do their thing. This is even available in free chat!
Finally, you need to know the amount of content available. In total there are about 135 performers registered at this moment, but how many are on at any given time is pretty random. When I was on there, about 7 cams were available, but I would think that at peak hours it would be even higher.
I liked Live Cam Network. The models were fun, cute and the ones I chatted with were excited and willing to do whatever I asked (and with a big smile on their face as well); the overall quality of the cams was very nice indeed too - especially those HD ones. The price tag for VIP chat is higher then some other sites, but the quality of the cams and the models does justify the charge.