Pro is worth it if you have a fast connection, download popular files with many sources, or search for rare content. But, you can download the source code for free and hack it to get the same functions and features as Pro, all perfectly legally.

The free support here has been more effective for me than Pro support.

Getting Pro is really about donating to the project to keep the developers developing, IMHO.

Since everything about Pro can be done for free, the only reason to get Pro is to support the project, so others can use the code too for free.

Get Pro.

Oh--I'm on a Mac and have been getting Pro for about 4 years. There are far fewer issues on the Mac than on WIndows, but the biggest issue is after LW has been running for several days and you download lots. Then the OS X virtual memory can get up over 2 GB and LW becomes really sluggish/unresponsive, with the beachball spinning for minutes. We are still waiting for the Apple Java to fix this.