Sorry I'm going to type the following in English because I'm too lazy to do Chinese input.
I got the phone two days ago. Ordered it thru PCHOME.com and have a friend send it to US for me. I "downgraded" from Nokia 8800 so my opinion is a little biased. The slide mechnism is smooth, but not "solid". The 8800, of course, has the best sliding feel, but I also have a Samsung D508, and the slide on the LG doesn't feel as solid as the Samsung.
The touchpad is REALLY sensetive. It's a little too sensetive for me. I accidentally dialled out a few numbers when I slide out the phone and waved thru the "talk" button.
The little plastic door covering the charger/usb port has really bad design. I only opened the cover less than 5 times so far and it's already loose.
I can't really comment on the reception issue because we have both 850 and 1900 GSM here in Los Angeles so I can't really tell if the bad reception is due to lack of 850 frequency or the phone itself.
Bluetooth (transferring music from PC) is a little slow compared to the past few phones I had, namely Nokia 8800, Moto V3, V3i, Samsung D508, SE K750 and W800. Haven't tried the BT headset yet.
Other than that, it's a nice phone; cool looking, stylish. I wish it does have better menu (UI) and more user friendly though.