Description From Titleist:
"The new 990-B is similar to the original 990 in that the head is designed with upper and lower mass elements in cavity, or “weight pads” behind striking area. In the long irons, the lower cavity pad is thicker and the upper cavity pad is thinner to create a lower center of gravity (CG) and promote playability and higher ball flight. In the short irons, the lower cavity pad is thinner and upper cavity pad is thicker to produce a higher CG and lower, more controllable ball flight.
The 990-B Cavity is slightly smaller than DCI 990 iron for added workability."
Summary: I had played the 990 irons before and really liked them. I thought I'd try the 990b irons because, after all, I'm about as good an iron player you'll find who's not on the regular tour. I didn't like these and I especially didn't like the longer irons. A little clunky and chunky for my high-end taste. Do yourself a favor and try another flavor. If you don't 'em to sting then go get your self a Ping. See you later Ralph Nader.
Summary: I have played the 990-B's for several years. Great set up...easy to work the ball. Like many have said, this is not the club for the occasional player, but if you have the time to stay on top of them...then they're are great.
Very small sweet spot. On par three's, must tee the ball very low. High hits on the face come off very dead. Shots off the toe are terrible - but if you're the player with a consistent swing, these baby's are for you.
Customer Service: Never had a problem.
Similar Products Used: All previous clubs were more perimeter weighted, so none were similar.
Summary: I've had these for about 3 years now and am on the fence. They are dubbed as a 'muscle back' that is somewhere between a cavity back and blade, but they play much more like a blade. That being said when I play regularly (2-3 times a week) they feel like no other club you'll hit on the sweet spot. The club heads are heavier so immediately you'll notice 10-15 yds greater distance and need to club down on most shots (my 150 club is 9 with the 990's). The heavy bottom weight gives every club a fairly high trajectory, which seems to make the high irons a little easier to hit.
The downside to that small sweet spot, is that the clubs can be extremely difficult to play with when your not on or don't have a consistent swing. Mis-hits make the club rattle in your hand violently and teeing up a ball with your irons is not really and option as the hits high on the face come off dead.
With all of that, when I've had time to play a lot, I've gotten my handi-cap to single digits with these clubs, but when work or family have had me down to once a month on the course, these are not a club you can just pick up and play a round with.
I'd recommend buying a set of these for when you are feeling like gaming it, and a set of cavity backs for swinging around.
Summary: Maybe Lumberking should try hitting the sweet spot with these, cause they are the best feeling cast irons I've ever hit. Solid workability & lower ball flight on the short irons. Excellent! Can be had for a steal nowadays.