I use layer styles a lot. Especially when assembling my game assets into the final product. Unfortunatly it doesn't take too long until their usage brings Photoshop down on its knees. Moving a layer around often takes 5 seconds until the layer even starts to move. At that point you can't use the mouse to move the layer precisely any more. I can just move it into the general area and then use the cursor keys to nudge it into place- taking several seconds after each key stroke to see the movement.
I've watched my task manager and it seems that only the CPU is involved in those processes. My GPU is stuck at 0% through all of that.
Please do something about that. Even having a rather strong PC doesn't make a difference.