I love my LabelWriter, I have had it for ages. I actually own an older model that can print two at once, but this is the one that is currently on sale.
I mostly use it for printing labels for letters and occasionally packages. It is also handy for labeling boxes.
The software included allows you to easily import Excel file loaded with contacts, address correct via US Postal service, and then print them at lightning speed.
If you ship a lot of packages, you might want to consider the XL version that supports printing large package for US Postal, FedEX, and UPS.
These printers are thermal, meaning they require no ink. You just buy the labels and you are good to go. I buy after market labels in bulk and save a ton compared to factor labels. Never had a problem with any of them.
You can find the LabelWriter on sale right now for $82 shipped from Amazon
All images are from Amazon product pages