Pro's: Smoother, more accurate video leveling correction,
3 axis leveling.
Con's: Fragile, needs battery shortens usage time, made for specific camera's, not always water proof, high maintenance. limited mounting options, usually more expensive.
Pro's and Con's using our Self-leveling mounts:
Pro's: Easy to use and maintain, no battery, allows for different cameras of varying weights, mounts on rail mast spreader, wherever!, Waterproof, strong, will take abuse. Inexpensive.
Con's: Not as accurate, slight delay in leveling (due to dampening). Single axis leveling.
Comment here if you have tried using a powered gimbal mount!