Dektol. Ooo boy, Dektol. I have hated that stuff since I first discovered there were alternatives.
It works fine, and it's readily available and pretty cheap. But it leaves blue stains anywhere that you even look at while using it (I know, I shouldn't ever try amidol) and the working strength mix is good for one session. People keep telling me otherwise but I've tried it many times and it just doesn't keep as a working strength solution, at least for me, even in full tightly capped bottles.
YMMV of course. I don't think any print is going to succeed or fail because it's developed in Dektol versus LPD versus MG developer versus fill-in-the-blank. For the most part they all work well enough, just pick the one whose other traits you like.