My son realy wanted this, becouse my brother has one. I use the 60CSX however and did not research enough before buying the one he wanted. This is a very good kit. Good price and exceptional quality. However none of my computers have RS-232 ports. I did not to think about looking at the connector, becouse I am so use to mine having USB. So I spent $50 and got the adapter, this did not help alot though. We can see the device almost every time, but most of the time it will fail its data uploads. So far I have not come up with a good solution. Once you do get it to upload however it works well. It does not get good reception in the woods or near cliffs, but this is to be expected with the older antenas. So If they would fix the connection problems (PC to GPS) I would rate this 4 stars. If you have an older computer you should not have these problems, just make sure you have RS-232.