If you had asked me this question a couple months ago, I'd have given you an emphatic "Yes!" Today, however, I can only give you a half-hearted "Sure."
I agree with those who say just get yourself a 1-month sub, maybe twice a year (or even once,) grab all the content (you could grab all of it in a couple hours,) and enjoy it.
The Character Builder and Monster Builder are invaluable to me, however, I'm growing steadily more impatient waiting for "the next" tool. The last I was told was that there should be some word of the next tool within the next few months. That tells me another tool won't be delivered until at least the middle of the year (given that an "announcement of what's next" is still months away, plus time to deliver.) That will be after I let my current yearly subscription lapse.
Of course, if they come around in April and say "We'll have the entire suite of tools -Encounter Builder, Map Builder, Trap Builder, Campaign Manager, whatevertheheckwemanagedtocomeupwith- to deliver by the end of the summer" I'll immediately renew my yearly subscription.
Right now though, the measly monthly updates to the two tools isn't enough to justify the cost. I know people will argue that Dungeon and Dragon add value, but I no longer feel that way. I barely even read any of the content beyond Ampersand, Design and Development, Skill Challenges, Dungeoncraft, and Confessions. I don't use the adventures. With the Monster Builder I have what I need to build my own. (Plus Masterplan and PyBuilder are serving to fill the void left by a lack of official tools.) I extremely rarely use the Compendium.
I really could get more than enough of what I need from just downloading everything once per year. I really don't want to feel like that, but unfortunately, until we get more tools I don't see that feeling changing.
I echo what was said about the character sheet output as well. I made a request for the CB to print sheets more like Monster Builder stat blocks for my more noobie players, but never got a response. The sheets that come out of the CB are too long. They contribute to drag as players spend their turns flipping page after page to compare powers. It drives me crazy.