DigiCool. No matter what model beats all the rest.
see the Video on their web site
Its like being able to watch a needle swing on an analog but in tenths of a psi.
Its awsome! If you get used to it you won't want to go back to anything else.
Sman3 all the way. I had that thing out in the pouring rain yesterday and nit a bit of problem. That thing is the best thing since sliced bread, subcool, superheat, all right there all you have to do is look at it. It also has a built in vacuum guage which is cool to cross-reference your other vacuum guage with it. One of the theremocouples broke like the second day but I took it right back to Johnstone and they gave me two new ones for free, no questions asked. So other than that it has been great. I am also really rough on equipment and have already dropped it a couple of times and it rocks on. Long live the sman3