There are a lot of different tools used in the tree business. Most importantly are the different types of chainsaws. Many tree guys argue that stihls are better than husquvarna. In my opinion stihls are ten times better. I think that because they are a heck of a lot easier to work on and are so much more powerful. Stihl makes one of the best climbing saws around too. the ms201T has so much power and is a great in tree saw.
Another great climbing product is the weaver sattle. its Much more comfortable than any other sattle. they are form fitting and dont kill your nuts like all the other sattles out there. Plus it is fairly priced and very reliable. I've only used that kind for my years of climbing and it has failed me yet. Even my dad who has been climbing for 30 plus years only used weaver sattles.

the next and most important thing in the climbing world is rope. having the right kind of rope will make or break you. If you have a cheap flimsy rope then you are basically done for. You need a good reliable rope with good tensile strength and that is longer than the tree that you are climbing. The best rope to use is the new England brand rope. the best rope they make is the Hi-vee orange rope. It can be used for everything. You cant ope down big branches with it and also its great for climbing with. There is nothing you cant do with that rope. Its also cheap and very light weight.
The $th and final thing to make your climbing experience great is a good pair of tree spikes. The best tree spikes on the market are the geckos. They are so light weight that it doesnt even feel like you have anything on your feet while climbing. These spikes are a tree guys best friend. As lon as the spikes in the wood, you arent going to fall out. Every tree guy around should have these spikes.
this will conclude my review of different climbing gear. In my opinion, these 4 items are all you need to make your tree climbing experiance all the better.