After considering the Merge, Mesmerize and Genesis for my new phone, I decided on the Genesis, mostly on the quality of the keyboard.
Since my purchase, I have been very pleased with the Genesis.
I absolutely love the physical keyboard. It is fantastic - soft and responsive, with large keys and a great layout. The shortcut keys are very useful, especially the ".com" key, which saves a lot of typing. I can't say that I've really used the directional pad at all, so it seems like it might have been a bit of a waste, especially with the interior touchscreen.
Call quality and volume has been great, including speakerphone.
The camera takes surprisingly good photos and the flash works well for low light situations.
Photo sharing is simple, with a pop-up for email, messaging, and various social networking sites.
Email set-up was a breeze, including a Microsoft Exchange account.
Battery life has been far superior than the 2.5 hours stated by LG and US Cellular. I generally get about 8-9 hours before I need a charge, which seems to put the Genesis in line with many other Android phones and suits my needs fine.
Music and video playback is good, from both the SD card and apps.
Full Market access and side-loading for Amazon and other sources.
The camera can be a bit laggy between pressing the button and a picture being snapped. Hasn't been an issue for me, but anyone trying to take pictures of kids or anything else that moves quickly might have an issue.
The SD card is under the battery. This means that if I want to access it directly or swap out a card, I have to pull the battery and shut down the phone. The launch time for the phone isn't bad, but it's still a pain to have to go through that every time I want to swap a card.
The physical volume keys are poorly placed when the phone is flipped open. For example, when I was watching a video on the internal screen, it was almost impossible to adjust the volume using the physical controls. A minor annoyance, but still an annoyance.
Opening the phone during a phone call that is on speaker shuts off the speaker for some reason, and it can be a bit of a pain to scramble to turn it back on during a call.
Because the Genesis is a USC exclusive, it doesn't seem like there's much of a community to create roms or work on rooting. I am pleased with the standard experience, but this might be a consideration for anyone looking to root the Genesis.
Overall, I really like the Genesis and would recommend it to anyone looking for a smartphone on USC, especially if you want a physical keyboard.
If I didn't cover something about the phone and you are curious about a particular feature, please feel free to ask.