The set is not incomplete. The set is just about as complete as it could be, as is the set for the sequel-in-spirit, Undeclared (hilarious).
F&G does not end on a cliffhanger, it's a (mostly) suitable ending for the series/characters.
Anyone interested in the F&G Yearbook? I'm considering putting mine on ebay.
I've ordered from DVDPlanet, and every time I have gotten my stuff--however, they've caused the most hassle of any etailer. Got the total wrong item one time, had orders cancelled without notice, had orders sit forever even though the item said "in stock". I only made my last order there because I had store credit. Though I did get my stuff, I would suggest spending a little more and ordering from elsewhere, DDD, Amazon, etc. Even though DDD is their sister company, I've never had the problem with them as I did with DVDP.