Had a truimph which was great but only lasted a year. I did pound it into the ground, walking at least 3/4 miles every day and sometimes a lot further. Eventually one of its wheels fell off and I had to push it home on 3!
THen bought a Ryder which is great. Had it now for 2 years and still going strong. Slightly larger wheels make all the difference. If you are going to be doing a lot of walking, I'd invest the extra few quid in a Ryder or Techno.
HTH.