I can't speak for COS, but the AUTHENTIC is way underrated! AUTHENTIC comes with flows that he doesn't display on the GAMBLAZ CDs (which are usually dominated lyrically by TELLY MAC). Cool features from MR. KEE, BIG RICH, and of course, JT, SEFF, D-MOE and TELLY MAC. It'd give it a 4/5--you won't be wasting your $$$ if you buy AUTHENTIC. One of GET LOW's better recent CDs, IMHO.
As for SEFF's new one ("Leathal Weapon")--well, I like it, and none of the songs are wack, but it's TOO DAMN SHORT (only about 28 minutes long)! If you don't mind paying full price for a CD that short, go ahead--otherwise, you might want to buy it used (but again, the songs that are there are pretty dope, with JT and RAPPIN' 4-TAY among the features). It'd give SEFF's 3/5 (if only 'cause it's not long enough). PEACE!