I've got a pair for Karrimor boots, and I've got to say they are like 2 different boots in different conditions. I'm currently looking at replacing them, and they are hardly worn.
On grass and soft surfaces they are fine, lightweight and comfortable, decent ankle support too. But on rough ground they are shocking, I climbed Skiddaw recently, and I felt every single stone and sharp rock through the sole. It was that bad I actually considered putting my trainers back on for the walk back down.
The soles are way, way too soft, and they don't have sufficient grip for even damp surfaces, so you find yourself slipping a lot, especially in places you wouldn't expect to slip.
Would I recommend them, not really, unless you plan on very easy walking, but if your planning on walking on rough ground, definitely not.