First of all, the downside: yes, it is plastic but I knew that before i decided to buy it.

On the other hand, this is an very versatile tube screamer clone that sound so much more expensive then it is. I use it mainly for stacking but it is more than good enough to be used on its own. You could even use it as a boost if you turn the gain all the way down. In that way, it might even be worth having more then once on your pedal board...