Recently I purchased an Ampeg PF500 as my Class A was getting repaired. I bought the portaflex with intentions of resale as I got it cheap enough to get money back when the repairs were done. At first I will say I was disappointed but what can you expect for the price. But then I plugged a Tech21 VT Bass pedal into and it totally blew me away!!! Ive decided to keep it now. Hopefully someone may find my advice useful. I spend a lot of time reading TalkBass and thought I would share this experience.