pole saw good. I use an 6-11 ft zubat with a hook fox on it. I carry it up into every tree and often leave the scabbard on and use it largely to move rope and lanyard around. I certainly don't saw with it in all trees, but it comes out at least once in quite a few. I'll make cuts if the angle is right - usually adjacent branches to the one i'm in, as making proper cuts in the branch you are on can be very difficult to do properly. With practice, however, you really can make some pretty decent cuts with a pole saw. There is certainly a learning curve of skills and strength. I am still not sure about that funny hook fox - it has a nice shape for moving rope and pulling brush, but it is heavy compared to my previous setup (a bent and electric taped bicycle hanging hook) and can also be kind of bulky. I wish there were a smaller one. Sometimes i will take my old handsaw blade and put it on the pole saw when i get a new blade for handsaw. Right now I wish i had a brand new blade instead. But then i would just bend it immediately. Life is hard for a pole saw blade.
x2 on what others said about taking weight out of branches that you want to climb out onto and remove. also cleaning hangers on the way down.
for cuts further out on a tip that i can't get to, I have a 7 ft ARS long reach pruner (the fixed length tougher one). It has the angled head, so you can make a proper cut. It will never be as good as being there in person, tho, so it always depends on the situation, like others said. I put a hook on it so I can hang it in the tree and not drop it all of the time, which i have already done all of the time until that hook went on. I have a planned rant and rave on the long reach pruner coming. pole pruners with the rope still confuse the heck out of me, but i'm trying to keep my mind open.
a huge ground saw can be nice, sometimes it makes for a 2 minute cut instead of a 20 minute climb to get that one pesky branch. also, I have been thinking of getting a little silky nobita for orchard and ornamental - a 4 ft fixed saw (or a 5 ft or 6 ft) with a straight gomtaro blade. I'd like to put a prosentei dual tooth blade or maybe a fine-toothed on it, and wonder if they'll sell it to me like that.
just chiming in from the "pole saws are pretty useful" blah blah blah section.
pete