'is it any good?', yes.
'... this is the first time i have seen this browser, so ... i guess it's too new.', no - while it is new to you, it is not new.
Go check the copyright and / or version number in 'Shirra's 'About Shirra' dialog box.
Seriously, like the other Macintosh web browsers ('Camino', 'Firefox', 'Flock' [it is very new], 'iCab', 'Internet Explorer', 'Mozilla', 'OmniWeb', 'Opera', ''Safari', etc.) - 'Shirra' has its benefits, and its shortcomings.