I have several of these, and I enjoy them thoroughly. They can work with or without an external GPS antenna depending upon the configuration. I found the ones with the external GPS antenna to work better, but the one without an external antenna works great next to a window upstairs. The color LCD screen is a great indicator of how many GPS satellites the unit can see at any given time. I even borrowed the PPS (Pulse Per Second) off the GPS board to run into a small NTP server here. That really worked great as I was not only able to see what time it was, thanks to the clear LCD screen, but also have the precise timing from the GPS board used by NTP to keep the local network time in sync (Note, that application requires some customization and isn't supported directly by the maker) I highly recommend these to anyone who wants a VERY accurate clock!
For nothing but resistors and LEDs, the kit is one of those "grab and go" necessities. Sure, you could pull together the parts and breadboard a similar outcome, but for a few bucks, why torture yourself. Once you have, it will surely stay nearby ready to plug and go.
Jan. 6, 2015
Bought four of these. They are great for my projects