Nice to find there is a forum for this great program.
I just managed R1 of W4, which seemed much harder on paper than it turned out to be (I hope R1 wasn't just a fluke and I can manage 2 and 3 as well!)
I ended up doing week 3 3 times, once extra because I didn't feel ready for W4 and once to get me back to running after being out for 2 weeks with a really bad flu.
W4 is definitly a big step up in difficulty but the advice and tips where spot on. Actually looking forward to my next run!