When I got my Spider V120 the first effect that I tried was vintage tremolo. I was very disappointed and figured that it was going right back to Guitar Center. Luckily, I installed the Spider V app on my iPad and and found that when adjusting the tremolo settings with it (rather than the amp itself) I could get exactly what I was looking for. Now, I use the app anytime I am creating a new tone or fine tuning an old one. It is so easy to switch the order of effects and also make minute adjustments.