i am looking at this bow and wondering if it is a good bow? was there anything that i should watch out for? is the weight and pullback adjustable like on many other bows? i am a rookie and need some quick advice! http://cgi.ebay.com/Buckmaster-320_W0QQitemZ280064387749QQihZ018QQcategoryZ20838QQrdZ1QQcmdZViewItem by the way this is my first post!