Yes, it is one of the trustworthy and good anti-spyware. It is not bad to install more than 1 anti-spyware because not all of them will and can detect all types of spyware and malware.
You might want to add Malwarebytes' Anti-Malware, A-squared Free and SUPERAntispyware. All of these have freeware edition which will scan and remove.
You can get them at:
A-squared Free: http://www.emsisoft.com/en/software/download/
Malwarebytes' Anti-Malware: http://www.microsoft.com/mbam.php
The above are scanners only. If you want 'prevention' against spyware, I suggest to immunize the system using Spybot-S&D and by using SpywareBlaster: http://www.javacoolsoftware.com
i m using spybot for being protecton against spywares and adwares. I just need to know is it a good option or if u have something nice to suggest me then go ahead. i"ll appreciate your responce