I think it's great Marvel made a classic tpb for Deadpool. It's a great thing for fans who are interested in his beginnings. Unfortunately, this trade isn't great for longtime hardcore fans, as it's missing several early issues, unfortunately 4 of these set up his first limited series, which is in this trade.
Casual fans may not care, but as a long time Deadpool fan, many of the issues aren't included. In addition to the X-Force (3, 4)/Spider-Man (16) crossover (where Deadpool kidnaps Black Tom, setting the X-villain up for a tree experimentation and Deadpool's limited), it's missing Deadpool's battle with Weapon X noob Kane (XF 2), two fights with Cable and Domino (XF 14 and 15) and Secret Defenders 15 (with Luke Cage, who has been gaining popularity in his New Avengers appearances). It's unfortunate that these aren't in a "classic" trade.
The art is terrible (Liefeld), but it's also short on that stick as it focuses on his limited series, featuring then rising superstar Joe Madureira. Also notable is issue 1 (which seems out of place here and would have been better off in a DP Classic 2, with a run of those issues).