Wonderful plugin but lack few feature

It’s a wonderful plugin and doesn’t add any considerable load on the site. I would give it a 5 star had it given me the option to put two different codes for different devices on the same location. E.g If I want to put a banner under menu bar on all the location including the home page and inside pages but a different size banner for desktop and mobile phone, it wouldn’t allow me to do it. In such a situation I have to put the ad in different places which looks very odd and doesn’t help the advertisers and webmasters too.