Most good pro shops carry the stuff. Even if they are not on the company web page dealers can get it through PSE or a distributor. Of course you can order it direct too! I think Sportsman's Warehouse had it at one time, but perhaps that was during Wholesale Sports, I'm not sure.
We were beside one another at the ATA show when the two partners were first bringing it to market. We have become quite good friends. They are very good guys and absolute geniuses. I'd be willing to wager they are possibly the smartest two guys in the entire archery industry with degrees in polymer chemistry or petroleum chemistry...something like that. They are such good folks I'd probably use there stuff even if it wasn't the best on the market today. But, it is the best so it's a win/win

The fluid has a sponge applicator so it is about as easy as waxing could possibly be! I run it up one side and down the other, rub it in a little with my fingers and let dry. That would normally be good, but I like to put a second coat on to make my string colors really "Pop". If it is not raining I probably only dress my string two maybe three times a year. On rainy hunts I'll redress every week or so. Wife is a little tougher on strings than I am so I probably dress her string twice as often. Point being is that little tube at $10.99 will likely last you two or three years if you keep the lid on tight. So it's a very good value!
I keep a tube in each truck, one in each pack, one in my bow case and a couple on my string jig. Absolutely will not make a string without it! Won't go hunting without it! Won't travel to a hunt without it! And the best thing is I no longer put leather to string and then have to take Lava soap to my hands to get all the nasty's off

They also have some arrow snot that is slicker than...well you know! So slick I once put too much on an arrow and could not get enough grip on it to pull it from the target five days later. I don't put it on arrows anymore

But I do use the stuff around the shop to keep all my equipment working perfectly. Our blade counters used to always stick. One tap of the sponge to the jig and it's been stick free for over a year! Clamps on my Bitzenbergers were always clicking and sticking. Once again, a simple tap with the sponge and my fletching jigs act like they are better than new rather than 40 years old!
The only thing I use wax for anymore is dressing the threads of my field points, broadheads and sight screws.