Have also worked a little HDR images. I think the renders are really good with it. But sometimes the renders are extremely overexposed. I got the problem under control with the Cycles Gamma node. The first image was rendered without the node and without a rotation, the second with rotation, the third image I then corrected with the gamma node. I used the HDR image. Without applied rotation it was not bad but too dark for my purposes. After the rotations it was extremely overexposed. The differences between the images become quite clear.

The Material room:

Image 01 without rotation:

Image 02 with rotation:

Image 03 with rotation and gamma node: