BleepingComputer.com: Web Drive from South River Technologies,worth buying?

Hey Folks,
I was wondering something. I currently have a trial of the Web Drive FTP client running on one of my computers here. A friend of mine has a server which this software connects to beautifully. I've also been able to connect it to some other servers, but at the same time, there are servers which it resists connection to and either gives me a winsoc error (error code 4504), or it gives me a server connection failed error (error code 4509). I can't find any articles regarding it's server compatibility (E.G. if it only connects to windows FTP/SFTP/Group Drive), or anything about whether it connects to Linux servers or not. The only server I ever had trouble connecting to (the one that gave me those errors), was a server of a guy who basically worships linux and disses windows and it's integrity as an OS, so he wasn't very helpful nor was he supportive in finding the issue. I am still contemplating the possibility of buying the software simply due to it's convenience, allowance of server integration with Windows Explorer, and most importantly of all of these, it's accessibility with screen readers since that is what I rely on being a visually impaired user of a computer. Any input slash experience reports would be wonderful. Thanks so much. BTW, I tried contacting SRT myself, and in order for support requests to be sent, the one sending them must be a registered user and have purchased a license. No offense to them, but that doesn't really help folks like me. LOL.

Regards,
Chromebuster