Yes, they are really useful. I've also got a -30dB version that uses a series 1500R resistor but this needs a tiny shunt cap to help compensate for the self capacitance of the 1500R resistor. But this is because I used a basic leaded metal film resistor rather than anything exotic. See the image below.
Quick and dirty homebrew versions like this tend to fall apart because the resistor inevitably snaps away. So I tend to make mine on a SMA end launcher like the image below. It is quick and easy to repair as long as you have lots of 1500R resistors nearby
This is the -30dB version so it has a small compensation cap on it. The inductance of the skinny TCW ground lug limits the frequency response but it typically works up to about 2GHz although probably with about +/- 2dB ripple in the response. But this is plenty good enough for quick and casual signal tracing. It does need that SMA coaxial DC block at the other end of the SMA coax cable though. Eg from Minicircuits.