1.) IMHO. yes. very worth it. For several reasons:
- You can simply choose and frame your target, then tell you system to do the rest.
- I can setup multiple targets in a night, all with a different framing, and not have to attend to the system at all.
- Speed, Efficiency and most importantly, Repeatability.
- Especially useful if you pair it with a Motorized Flat Panel.
2.) The same reason everything else is expensive, they are priced according to what the market will allow. also like everything else in this hobby, they're a precision piece of equipment.