I think I will be making the switch to coir as well, as for some of my W/S'ing adventures were not so successful. No problem with Jiffy Mix so far, but the pellets did not work out for me. I sowed some lupine, in them with the domes, outside on my 4-tiered shelf. I had to remove the seedings, once they were up as they were molded. Hopefully it was just the peat pellets, as I gave them a good soak, and they were probably too wet, so no way to reverse it. (I did not have to pre-soak the lupine...as they were soaking the whole time!!)
So far they look good in their uncovered cell packs. I did not wait until they had true leaves as I wanted to get them out of there in a hurry! It is 40 degrees out there now, and it is snowing. Oh, when will spring be here to stay?