We've had a couple of Foscam IP cameras for several months, got them back in Feb '12. Ours are actually the 8918W, got them in a 2-pack that also included the optional larger antennae. Pretty easy configuration (use the ethernet port initially). Our home/office network uses static IP assignments, which is handy for these, otherwise, FosCam provides a little "discovery" app so you can find the IP assigned to the cameras.
The construction is solid, and the included power supply has a decent length cord. They're easy to place, and include some hardware for mounting them on walls, ceilings, etc. As mentioned, we're using the larger (~12") antennae so they connect without issue any place in our house (up or downstairs).
The IR works really well, it's a touch visible, so if you're using this to monitor kids, there's an array of faint red lights they'll be able to see (and could be a little frightened by it ... it's a little creepy). This can be toggled on or off.
The pan control is also reasonably quick and totally quiet. You can pan around to pretty much any angle, I'd say like a 270 degree "dome" of range, of course limited by your placement. There's a mode you can set where the camera will auto-pan back-and forth. You can also swap left/right, up/down, to get proper orientation of the video stream.
The video quality is OK. There are two quality settings: 320x240 and 640x480, with the smaller resolution providing higher frame-rate.
We use the "push" mode in a browser to connect (Safari on OSX), but there's a IE specific option that uses an Active/X control, never tested it, supposed to be a little more responsive. The web interface gives you control over the refresh rate, IR toggle, pan controls, auto-pan toggle, resolution, screen capture, plus utilities for uploading new firmware, diagnostics, settings, etc.
We also use the free version of CamViewer for iOS. Works good with the 8919Ws, same controls as the built-in web UI, easy to setup cameras, switch between them (it doesn't allow concurrent viewing ... the web UI does, simply open each camera in a separate window/tab).
We've never gotten audio to work, though I never spent much time with it. The Active/X control is supposed to support audio right out of the box, the non-IE browser solution requires downloading an additional audio plugin. Apparently the pay version of the iOS app we're using now supports audio on these cameras as well. Again, audio was very low priority for us.
So bottom line: our FosCam product has worked well for us and was a decent value. If these cameras improve on any of the features, they're probably even better.
If anyone has any specific questions about use, configuration, networking, I'd be happy to answer.
CamViewer for iOS
Foscam 8919W 2-pack
Foscam Pan & Tilt Wireless IP Camera with 9bdi antennas 2 pack FI8918W