Sorry for chiming in late, but I had the Monogram boxing of the kit and FWIW, at 100.00, I think your better off going with the Revell 1/96 kit. You can generally pick up a Revell 1/96 on ebay for around 50.00 or so. (I got an old version of it off ebay, complete (except for sails) for 15.00)
As mentioned, the Monogram/Imai doesn't have a gun deck - the half cannons plug into the holes in the gunports.
I also found the detail a bit heavy (woodgrain) and really wasn't impressed with the lifeboats at all.
I do like the cannon port covers. It's my understanding that they more accurately represent the correct ones.
The Imai/Monogram kit is a nice kit despite the flaws that I personally don't care for.
I opted for the Revell 5600 kit, it's about a 1/150 scale & I find the detail more comperable to the Revell 1/96 kit - but that's just my opinion on it. Plus, I have a few other ships in that scale range that I want to build so it fits into my scale fleet a bit better.This kit generally goes for around 20.00/25.00 or so but it doesn't come up very often.
I have a picture somewhere that I took of 4 different scale Constitution hull halves - the 1/96 Revell, the 1/120 Monogram, the 1/150 Revell & the 1/192 Revell. If I could figure out how to post pictures here, I'd post it to show the scale & detail differences.
Adrian