For testing, I have built up my little 38cm camping bowl and adjust your cost-LNB on a signal quality of 60-65%. More is hardly there at the small bowl. The Inverto brought no improvement in quality - I had after the adulation that you sometimes read here, not expected, but says only that the Inverto also can not perform miracles.
All 4 outputs operate and deliver the same signal quality. The rain cover is somewhat difficult to remove, but it covers the F-plug from complete - which is excellent for our Hamburger foul weather.
Conclusion:
The LNB was a good choice. You get here for cheap LNB for 4 separate receivers. HD can be received loosely with a 38cm dish, and with a larger bowl, measure better values.