I using DrWeb by myself on WinBased OS and I know that:

Minuses:

DrWeb is slow on scan of compressed files
Using lot of RAM sometimes
Damaged installation of some programs when it is in Realtime mode protection (disable spider and continue install of software)

Pluses:
Smal
Good
Dont requid much from computer
Can be installed with other AVs on same computer just for scan (without spider)
DOS, Console, "Visual" Scanners avalible in one "installation"
DrWeb dont realy requid installation, just unzip and use.

.........
Hehe, correct me if I am wrong