The upside of PCI is the speed improvement. The downside is possible conflicts with older DOS programs,although Turtle Beach does claim that the Montego supports DOS games. From my experience getting DOS games to work with any soundcard is usually a challenge unless it' a true SoundBlaster. Montego requires an available PCI slot, preferably away from other cards and especially the video card and power supply if possible. Other cards and the power supply can leak signals that could be picked up by the sound card as noise.
Installation is quick and easy.
Uninstall any existing sound cards and their drivers. Turn off the PC, locate the empty PCI slot, slip in the card, connect the audio cable from your CD-ROM player, connect your speakers, start up the PC and install the drivers. The board provides microphone input, stereo line input and stereo line output. The ports are color coded which is a nice touch. Unfortunately there aren't any ports for a second set of speakers.