Ain't nothin wrong with it, unless you need more than 8 shots
I think high capacity is an important selection criterion.
There are quite a number of very capable, reliable .45 acp launchers. All equally "defense" accurate and relatively equal from a reliability standpoint.
SO what really matters most to me among them is simplicity of operation (same trigger pull every time) and capacity (higher being better). DA/SA, decockers, etc. all add more operational complication than I like in a defense gun. Thus, I lean toward the simplest operating design (Glock is a good example here). Next up is capacity. Here's where the 1911's (dearly as I love them) and the other single stacks (like the 220, USP, etc) lose out for me. I'm a believer in carrying the highest capacity pistol you can (within constraints of workable size, reasonable weight, potent caliber, etc.). These days it is quite possible, perhaps even likely, that one may encounter multiple assailants. Factor in the likelihood of having a number of misses and/or ineffective hits and seven or eight rounds can be spent in a hot hurry, without the task of stopping the assault being accomplished, thus leaving the need for more rounds on tap, often without possibility of a reload.
SO choosing from the various .45 acp handgun choices which have relatively equal reliability, these two points: simplicity of operation and high capacity have lead me to my preference for the G30 (11 rounds) and G21SF (14 rounds). These .45 acp Glocks exemplify ultimate simplicity of operation, stone reliability, proven durability, excellent accuracy, and high capacity (for caliber). All I do to my Glocks to sweeten the deal is install smooth-faced triggers (if the gun doesn't have that already, like the G30), a 3.5# connector (resulting in a 5# pull), install night sights, and polish the trigger action interfaces.
The XD45 and XD45C are quite close (akin to the G21SF and G30) to meeting this same criteria for me and I'm sure they would do a splendid job as well. I'm not quite as happy with their higher bore axis and grip safety lever, however, though I like the guns a lot overall. I don't feel that the M&P45 is quite ready for prime time yet, though in time it probably will be. The new HK45 looks to be a great gun, but suffers in the capacity criterion, I think... for a full size .45. If I'm going to use a full size .45, I want 14 rounds on tap!