Bests & Worsts Reviews from Amazon

I have 8 4ch Tektronix 3000/4000 oscilloscopes plus a 4ch Rigol 8000 (which I love) and several other smaller oscilloscopes and a vector network analyzer. I was looking for something handy. This oscilloscope is barely working to check some signals. First, it does not work at 100Mhz. What it does is that it sweeps in many passes to capture a high frequency signal. So if you have a steady 20Mhz signal, you can see it. If it's changing, you can't. it jumps a lot and can't show even some simple low frequency signals. Also, the voltage amp is off by more than 15%.