Thanks for the advice. Sorry I was being very vague with my post. I did wonder if the Reeboks were gimmicky. It is just that my Nikes are getting a bit worn and are not as comfortable as they used to be, so I started looking around really to see if there were any updated Nike+. (I like the Nike+ to track my distance when I change my route). I am ready to increase my distance but am limited to the time I have to get out for a run and when I read up on the Reeboks I wondered if I could keep to my current time limits but I would find it a bit more challenging as I thought they would work my muscles more! As you can probably tell I am new to running, so I apologise for my naivety and all your advice is greatly appreciated.