Yes, I have two of them. I keep one on my good climbing line and one on my 'pine' climbing line. They are always on the rope, even when the rope is in the bag. I use spliced ends and have a biner that stays on the end of each line.
Once on site, use Big Shot to place throw line, attach climb line to end of throw line, and pull climb line into tree. I pause for a second, after the end of the climb line is over the limb and on the way down, to tie a slip knot in the ascending side of the climb line. Keep pulling to get the leather over the limb. Grab ascending side again and pull down while holding the other end, to pull out the slip knot.
I often use a quick snapping motion to get the throwline-climb rope connection over the branch or through the crotch. I do it again to get the leather over as well. Overall I would say I lose less than a minute per rope install to have a low friction/branch saving TIP.
In the rare cases where I can't get the leather into a crotch because of it catching on something, I just pull out the slip knot, tie off the end and climb SRT. Once I get up to the problem crotch, I manually place the leather and change back over to normal rig. On the trees I plan to ascend on SRT, I still try to place the leather to reduce possible damage from the rope sawing back and forth as I bounce my way up the line.
Removal is easy as well. I just pull the climb line, and the biner on the end catches the leather on the way out. If I'm over hard surface or the leather is in a tight location, I attach a throwline to the biner first so as to be able to work the line back and forth to get it out and control the landing speed on the hard surface.
I lose a lot more time over placing the throwline than I do because of the leather. That little leather tube makes the climb easier, makes my rope last longer and can be a selling tool for customers as well.
Try it for 30 days and I'll bet you will become hooked as well. I would rather give up my split tail than my leather tube.
Rick