The Verizon MiFi 4G LTE (4510L) is the easiest device I've set up in a long time.
Basically you just pop in your SIM card and battery, then plug it in to get powered up, and turn it on.
The device shows up in a list of available local WiFi hotspots.
Next you select the hotspot and key in your password which can be found on a sticker on the bottom of the device, and on a slip of paper included with the device.
The font size on the password though is a huge failure at user interface design. You need magnifying glasses to be able to read it. In addition to the font being minuscule, the pasword is a string of numbers that looks like this:
4780000032589987
Would be very nice if the font was much bigger and the numbers separated for readability like this:
4780 0000 3258 9987
See?
As for performance, the speeds to the naked eye are very fast and after first use, no dropped connection.
The power adapter is yet another design in the history of power adapters. The Verizon MiFi 4G LTE is powered by USB, but the size of the wall plug is enormous compared to those from Apple or Kodak. You also have to install the power plug into the power adapter. So Lame.
As an alternative to the problematic USB 551L USB Modem, I can strongly recommend the Verizon MiFi 4G LTE.
The Verizon MiFi 4G LTE installs without any installation.
The USB 551L USB Modem install was painful on an old XP machine, could have been an older version of XP on that one, but also problematic with the USB 551L USB Modem was the USB extension cable that was strongly suggested and didn't sit well at all on a few laptop screens that I tested it on.
The display shows the signal and battery strength, and also how many WiFi users are connected to the hotspot.
This is a good device.
More at Verizon: Verizon Wireless 4G LTE Mobile Hotspot MiFi™ 4510L