I have only been running since the beginning of January and, with two stone to lose, I didn't want to spend a fortune on running leggings as hopefully I will need a smaller size in a couple of months. These trousers seemed to fit the bill.
These are my first pair of running leggings and as such I have nothing else to compare them to however I have to say I am really pleased with them. I'm a size 14 so bought my size and the fit is excellent. The leggings have a very generous drawstring at the waist which means you can undo them without fear that the string will disappear into the trouser (which is what happended on my trackie bottoms that I had been using previously). The material is very shiny and they nicely 'hug' the leg without squeezing it to death. As a previous reviewer mentions, there is a zip at the back of the calf and this has reflective piping around it - I personally like the fact they unzip as this makes them easier to get on and also means you could probably (although I haven't tried) get them on / off over trainers. My only comment about them is that they are obviously designed for someone slightly taller in mind (I'm 5'4") as the leggings puddle around my ankles however because they are tight they don't flap and it doesn't detract from the comfort so it's not really a problem ... I can confidently state though that these should fit anybody up to about 5'8".
They are very comfortable to wear and there is no downwards creep ..... all in all I am very pleased with them and they will certainly do the job until I get to my target weight and then I may treat myself to a more expensive pair .... there again I may just stick with these in a smaller size!