Out the box... the moment does have its problems.. with a little tweaking you'll find it runs like a dream. It's the magic of Android - customization. I'd suggest updating to a recent SDX kernel and new recovery, get the setcpu app, a task killer, and you'll be more than happy with it. I know I am.
Shcole, how do you switch between your phones? Are they both activated? I also have a moment and a pre, but the process to activate one or the other is a lot more annoying than just swapping out a sim card.
I have both the Pre and the Moment, and I can tell you the moment is a very solid bit of hardware. The software is Android 1.5 stock, so if you don't like it, dont blame the phone. I have used the Hero, and can tell you HTC's improvements to the UI are enormous, but this phone out-muscles that one by a huge margin. They keyboard is solid, the phone itself well made and substantial. Nothing fancy, but a genuine workhorse. The battery issue was solved by doing the run down three times bit, its good now. I really like this phone, and hope the 2.1 update gives it some added features and pizzaz.