Likewise, I have a TRX-1. Decoding Simplex DMR is excellent: as well as DMR transceiver IMHO. I'd say it decodes in excess of 95% of signals. The Uniden on the other hand will 'detect' almost as many signals, but will only decode maybe 10% or so.
My 996P2 Decodes DMR simplex just fine, and so does my TRX-2.
I keep the 996P2 because it starts fast and the SD card does not fail every 3rd time like the TRX.
The 996P2 is a much better scanner than the X36 series and the TRX series but it has no remote head so car installs are tough