[pauldodman]

Yes, I've used these for multiple client sites.
The good thing about using a true X-Cart banner mod, ie one built for X-Cart is that it has a complete backend so you can easily add your banners etc.
Because it is so powerful, in terms of campaigns, filters etc - it can perhaps be a little daunting initially - but you don't have to worry about some of the steps.
It's not super easy because of the toolkit it brings, but it's straight forward and logical. And the end result is excellent. Given some practice you can do some really nice stuff too - for example I'm just setting one up now with banners on top of banners to create more of a presentation effect.