Boat Stabilizing (Trim Tabs)

[SaltyShaw]

Well im looking into getting trim tabs and im curious about these automatic self adjusting ones, any one running them on there boat, are they worth a shat? or spend the extra money and get hydraulic or electric ones?
Im just trying to get a level ride and fix porpoising, im having to trim my motor down to much to keep it from coming up.
Any help or input would be greatly appreciated, Thanks!