I have had a roller for three days now. Two days ago wk5r2 went really well until the warm down walk, right calf tightened up and became so painful i had to hobble back to the car. used the roller at home tension eased. Used the roller twice yesterday on my rest day. Lot of tender spots in my right calf when i rolled it this morning pre run.
So i started wk5r3 very warily yet it went great, touch-wood, no problems with the run or the warm down walk. Early days but I guess I am a fan of foam rollers now. I have ordered a stick shaped muscle massager now as it looks like it might be easier to use.
Anyone starting out and having calf problems I would definitely give foam rollers a try.