Summary: Some design issues aside, the LG Quantum is a solid Windows Phone device with a spacious QWERTY keyboard for messaging fanatics.
Pros: The LG Quantum features a spacious full QWERTY keyboard and solid hardware. LG throws in 10 free apps. The Windows Phone 7 device has full wireless options and DLNA support, as well as a 5-megapixel camera with HD video capture.
Cons: The Quantum is heavy. The screen is on the smaller side, and Windows Phone 7 has limited landscape support. No expandable memory.
Excerpt: Among US launch phones, the LG Quantum is the only Windows 7 phone with a hardware keyboard. The horizontal slider has a large QWERTY keyboard that's pleasing enough for typing, though we found that some Windows Phone 7 apps don't run in landscape mode, making the keyboard occasionally awkward to use. The LG has a smaller display than other launch phones like the 4.3" HTC HD7 on T-Mobile and the 4" Samsung Focus on AT&T.
Pros: Has a roomy hardware keyboard.
Cons: Smaller display vs. competitors, less classy looking as well.