The low price is what drew me to RemoterVNC; I saw it could do SSH as well, and since my computer's VNC server needs to be tunneled through SSH, this was a plus. Upon purchasing, I found an additional $2 (technically $1.99, but that basically means $2) payment was required for SSH support! This angered me, but as this was still cheaper than most of the other apps, I complied. I was pleasantly surprised at how usable and FAST the connection was, at very minimal JPEG quality loss. The control setup is surprisingly intuitive; I found it not at all cumbersome. I did not purchase all the functionality, but together it would have added up to around $8, so if you are thinking of getting this because there are so many features for so little, think twice. Initially, VNC is the only thing available, and you need to pay for SSH tunneling if you want a secure connection. Just let the buyer beware. Overall, I found this program to be remarkably stable and we'll-designed. It doesn't try to hide options or sugar-coat things; it is a robust piece of work. I highly recommend it.
I saw some complain of problems with remote monitors; granted, I have only VNC'd into Linux machines with the Gnome 2 and MATE desktops so far, I have encountered no such problems. Overall, excellent for my purposes.