First post, by pixel_workbench
LN5ADM-CM89405 is the FCC ID.
LN5 belongs to Advanced MOS Technologies, (i.e. AdMOS themselves). and apparently it's their CM89405.
As for "any good" - define "good"...
It's an OPTi 930-based card (ISA PnP SBPro2 compatible chip, decent compatibility and generally trouble-free, but nothing special), with a real OPL3 YMF-262, and an AdMOS QS700 with a 1Mb (128kB) ROM and an 8Mb (1MB) ROM. The latter is most likely instrument ROM, so it's a low-end synth with a small ROM. It will sound low-end, but can do GM for you with no additional hardware needed. Build quality looks better than average for low-end OPTi-based cards, probably because this was an AdMOS showcase.
For a one-card DOS solution, you could do much worse than this. However if you already have a Roland SC-55 knocking around you're not going to be very impressed.
It is a Silicom Multimedia Systems Inc. WaveMaster 32FGS. The second picture shows the card with the Silicom FCC-ID.