Pretty good for a first try at a radio ad. The initial sound fx needs boosting (this catches people's attention to encourage them to take in the following message) and the vocals need to be more dynamic. Might think about a jingle or catchy call to action at the end as well next time. 👍
I had an interesting moment when I downloaded your link. It automatically loaded itself into iTunes and started to play. All OK, apart from the banging techno track which automatically followed it in the playlist. I thought it was part of the ad - WOW!
edit: Sorry if that sounded oevr-critical, it wasn't supposed to be. I produce advertising campaigns which cover all media so I'm probably the worst person who could have had a listen.