I am building a OMP Yak-55 100cc and trying to decide what servos to put in it. Tower has what seems to be decent ones that will do the job. Tower TS-150. Does anyone have any experiencce good or bad with them? Any advise is appreciated.

OMP has a couple Yaks. The 50cc? Servos are not a great place to skimp IMO. Those Towers are pretty slow.
If you are flying circles with and occasional loop and roll, you will be OK, but if you are looking to 3D it then I'd go better.
My choice for that is HS-985MG's except for the rudder and there a 7955TG.

It is the 100cc. Thanks

I would second what thunbskull said. If are really watching the $$ you might be okay with the 985's all aroud. The 985 is a very good servo for the money.

On the 100cc, you could use 2xHS985's on the rudder or one or two 7955's.
My preference would be a single 7955 or the new 7980TH on each tail surface. It's way less complicated than a dual servo setups.
Don't see how cheap you can do a 100cc. It's a different game.
7985's might be OK on the rons.

Do yourself a favor and use unregulated a123's for power for the servos.