I've used the free version for 2 years and it is superb. There are a huge amount of stations to choose from and every genre is catered for. personally the quality is crystal clear CD, superb (56k forget it, this is BB land, the adverts are not that intrusive and not often.
I have never bothered to 'upgrade' to the VIP version. 9I assume that you mean click here). Sign up for the freebie and see what you think click here then you can go for VIP grade if you feel that you would be better off.