Have just completed W4R2. Yes, I'm really pleased, considering how difficult I found the 1min runs of Wk1! Do I enjoy it? Words I would use are chuffed, amazed and stubborn!
However - I am frustrated at the (non)speed that I manage. I take it slow and steady, just as the lovely Michael tells me to. Believe me, I couldn't go any faster if I tried! But I honestly think my jogging/shuffling is no faster than my walking. I certainly puff/pant/sweat more, so I suppose the heart rate is getting a boost, but as for actual speed/distance covered, - I've a long way to go. Map my Run tells me I averaged 10mins/km. This of course was a mixture of walking and joffling, but all the same, I'm not sure that I'd be able to achieve a Park Run at that speed. They'd have all packed up and put the lights out by the time I got round!