I hesitated buying this because of some earlier negative reviews. However, now that I've purchased and used it myself, I'd recommend it to anyone needing to add bluetooth capabilities to a computer. Granted, it doesn't come with much information to help you install or use the product. But I found the installation easy (just run the program on the enclosed CD). The software itself took a day to get used to, but after a bit of exploring and some trial and error, I've got everything working just fine.
I now use this product to synch my Outlook calendar with the calendar on my cell phone. It now recognizes and connects to my phone instantly - and I can even transfer data while the phone is on a different floor of my house.
For those of you with CDMA cell phones, I'd also recommend trying BitPim software to manage your data transfer between the computer and the phone. Its free, easy to use. When paired together, the free software and cheap bluetooth dongle gave me a setup that my cell service provider wants to charge me $35 per month. Now that's what I call value!