The DW735 is a great planer, giving you a very smooth finish even on somewhat difficult woods.
Replacing knives is an easy task, especially since you can do everything with the one tool Dewalt provides. Of course, it had better be easy, as you'll be replacing knives a lot.
My only complaint with the DW735 (and it's a big one) is that the knives dull and knick faster than any knives on any tool I have ever used. They are reversable, so you get two uses out of each knife. However, they cannot be sharpened, and as of this writing, there are no third-party manufacturers of replacement knives (or helical cutterheads). You can see the price of knives at Amazon.
I would give the DW735 5 stars if I could get harder wearing knives from a third party or from Dewalt themselves. Note that the carbide knives Dewalt makes for their other planer are not available for the DW735.
When using the 735 to finish a large amount of soft tiger maple, I found I would get a smooth finish on the first board (with fresh knives), a little less on the second, and by the third 6' long, 8" wide board, I would almost certainly have a knick in a blade (which causes a line down the board) and some dulling (which causes tearout). All it takes to knick the blades is a little resin in the wood, a small knot, or just a hard spot. They really are delicate, even when taking extremely light cuts, as I did during finishing.
If you intend to plane a lot of hardwood or figured wood, I'd really think about whether or not the cost of knives is going to be a factor.
I went through three sets of knives roughing 500 board feet of soft maple. I would switch the knives when they got so dull it overworked the motor. Given the surface of the rough boards, I expected to go through a set, but I didn't expect to go through six fresh edges, especially given that the 500 board feet only came down to about 65 6' long boards (they were thick). I have finish planed maybe 20 board feet from that stack, and have already gone through another set (both sides) due to knicks and dulling. I could understand this if I was planing some exotic hardwood, but this is soft tiger maple!
By way of contrast, my original set of knives in my ridgid jointer (also used on all this soft maple) are still going strong, with no knicks and barely any tearout.
I can't help but think Dewalt pulled a Gilette here and planned on a strong revenue stream from expensive and short-lived replacement knives.
One other important point: this planer is HEAVY. If you plan to store it under a cabinet and pull it out to use it, or lug it to job sites, you may want to consider a lighter planer.
If you pick up this planer, I strongly suggest the infeed and outfeed tables. If you plan to plane anyplace where you don't want piles of shavings 10' in front of the planer, I also suggest you either hook up to a cyclone like I did, or get the garbage can topper. The blower does a good job of evacuating chips from the planer, but it really shoots them far.