I just got my Infinity Basslink installed last night. Installation took me right around an hour to complete. The sound of the basslink is very unlike most other subwoofers. It isn't overpowering bass, it just seems to be a filler for bass. What I mean, is it sounds very natural and integrated into the vehicle and compliments the rest of the factory system. It doesn't sound out of place because of too much bass. If you want a bass heavy system this isn't for you. BUT, if you're looking for a high fidelity, SQ subwoofer this may be for you. It has nice sounding bass reproduction. I can however tell you that if you have a 2000+ Bonneville the headunit has GOT to go. The stock GM headunits (including the Aurora, LeSabre, and Bonneville) all have an excessive bass boost at low volumes and then reduced bass at higher volumes meaning that with the basslink, or any subwoofer, the bass is overpowering at low volumes but if you turn the volume up a fair amount the bass becomes almost non existant. The stock headunit has GOT to go. The sound quality from it is horrible (the stock cd player.) the sound is very... dull from the DELCO cd player.
anyway, here are some of the pictures of the Basslink. Notice how little trunk space it takes up. Its sound is comparable to about one 10 inch pioneer subwoofer. it'* not too bad for how small it is. The basslink also has a built in amp.