Ok, here's the deal. There are so many available software that do the same thing that Radmin does. Literally doesens of packages both commercial and free.
The most important reasons that have always kept me with radmin as opposed to other software that may have even "more" features sometimes are as follows:
1. Strong mandatory end-to-end encryption.
I know what you're thinking. "so what, other software provide encryption too sometimes even stronger then Radmins". Yes but I have never seen a software that you could NOT decrypt the password from local "protected" memory or from the registry. With Radmin, your password is safe even on customer machines that you hardly ever visit and that even run under Administrative accounts. That is very special to me. Similar to the way Skype's (messenging software) password cannot be decrypted even when running under admin privs while ALL other known messengers have corresponding utilities to decrypt or "recover" their passwords. Basically, about the only thing you can do is CHANGE or REPLACE the password in the registry but NOT recover it.
2. Lightwieght, stable, and FAST.
Yes, the programmers of Radmin have taken WAY too long to release a new version. It is, at best, frustrating. However, what software DO YOU KNOW that can withstand such a LONG test of time and still work to levels of extreme satisfaction?? YEARS have passed and Radmin STILL outperforms brand new, and even seasoned competitors! This is something of a 9th wonder to me. While other software have gone through 15 version numbers Radmin has gone through almost none and still stands up to the test.
3. THERE HAS NEVER BEEN A PUBLIC OR PRIVATE EXPLOIT
What? Can that be possible? NO WAY! ... Oh yes way, no one (as of this writing, lets not get too cocky) in this many years has ever been able to remotely exploit Radmin via common overflows and the like. Search every well-known and "underground" security area and you'll not find one usable remote exploit. God ***** that's good programming if you ask me.
Without these things. Radmin REALLY IS NOTHING MORE then "just another remote administration utility".