Firstly, Dewalt assured me that the saw itself has changed very little from the old model. That being said, this saw is a winner! This thing has a durable look & feel, torque, stroke, etc. that put the 18 v line to shame. It cuts fast and accurately. Though heavier than most cordelss models, it is very well balanced when it matters most... cutting.

The batteries and charger are the main updates.
1. The new kit comes with two batts... the old kit had one.
2. The new batteries are ~2.4 amp hrs, vs. 1.7 with the old (longer run-time).
3. The fans supposedly extend the life-cycle of the saw.

This being said, if I was just shopping for a Dewalt recip, I would buy the new kit. This is especially true if I didn't have additional 24v Dewalt tools or additional batteries. Two batteries are definately better than one. If, however, you already have some 24v tools... the reconditioned kit might be a good value.

No need for cords, unless you want them.... (Rating: 5.00)
Review : I have the entire 24V kit, and I wouldn't trade it for anything. I like the AC/DC converter feature, so that when the uncommon dead battery situation happens, you're not left without power. DeWalt: How about a 24V jig saw, plate jointer, miter saw and handheld planer? I'll buy them whenever they come out.

Better than a burning torch (Rating: 5.00)
Review : I cut a 3.5" solid hardened steel blower shaft in half with this saw with one blade, faster than if I hauled a oxy/act rig up to the roof, or ran around trying to tap off power somewhere for a corded saw. This saw never stalled once and still had plenty of power left in it. This is one heck of a time and energy saver for me. Believe it from me, I'm a Commercial Air Conditioning Repairman.