is grammatically correct?!

Hello all,
could anuone kindly check my writing for mistakes. However, I have tried for two days to improve it. Now, i am not sure whether it is correct or not?!

Thanks in advance.

I hardly take notice of ads on highway billboards. However, I once
couldn’t take my eyes off a coffee ad on one of the billboards while I was driving on my way to work a few months ago. I wonder if that ad had caused any car accidents for drivers and walker since it was posted on the billboard few months ago. The advertisement showed a tea cup and coffee steam rising out of it. The special thing about that ad was that you felt as if there was real fresh and hot coffee in the cup. It seems to me that the directors of that ad must have been so creative and bursting with completely new ideas. Just between you and me, the coffee didn’t taste better than it looked on the billboard.