I got a pair last Xmas, wore them pretty much every day and they were knackered by about April of last year. Whilst I do a fair bit of walking I wasn't trekking miles in them every day. I was a wee bit disappointed to be honest when they started to split at the side (at the point where your foot bends as you walk).
Got a nice black and white polka dot pair in the Office sale for £26 and am now regretting it - but unfortunately they are non returnable as they're sale items 
Do I just have odd feet or have your Converse lasted years and years....