+1 to what all the others have said.... I do the same, I always have the throttle hold switch engaged even before I plug in the battery to the heli as a safety net. Carrying the heli around with the power on, etc. etc. Because in case you bump the throttle stick, bad things can happen whether you have soft start enabled or not... Working on the heli for some set-ups is great also.

Mainly its very nice to use the throttle hold stick for if something goes terribly wrong in flight. In one case for an example for my T-450 I lost all tail control and so when that happens there's nothing you can do but hit the throttle hold to cut the power to the craft, resulting in the main blades losing there momentum and causing less damage to the head components and other areas of the heli. Stripped main gears etc, etc...

Here you see me use the throttle hold switch when I lost control awhile back. The damage was about $10.00 worth, and throttle hold helped greatly as from that bounce it could have been more :


http://www.youtube.com/watch?v=M1Tg4BvX79o

[youtube]http://www.youtube.com/watch?v=M1Tg4BvX79o[/youtube]


The other great thing for throttle hold is hitting the switch, cutting the power, and floating the heli to a landing doing an Autorotation... This is a good practice, so that if you lost power to the craft, you'd still be able to land without power for instance. I've been practicing myself with them and trying to get it down in case that ever happens to me :


http://www.youtube.com/watch?v=O71UyWum08k

[youtube]http://www.youtube.com/watch?v=O71UyWum08k[/youtube]