Is it worth it to buy hivemail?

[influence]

ya they having a sale but am still thinking if I should get it or not.
80% off is a good sale. But the software have few glitches and few things I dont like about it after checking out the demo so I dont know If I should get it or not.

If I do get it, is it a good idea to get the unsupported license? because I might get that one. does anyone on here have the unsupported license and they are having no problem with it?

also, how hard is it to install hivemail? does anyone run through any problems installing it or had/having any problem after installing it?

does that stuff eat up hosting resources? even though am on dedicated server, but am trying to know though. especially bandwidth and cpu usage.

umm some pro's and con's?

I have plans to put it on my huge site so alot of people will be using it so does anyone recommend me getting a seperate box for it?

your reply will be truely appreciated.

chris