If you've been wondering which guide is the best one to purchase, and have narrowed your choices down to not wanting TDub's and purchasing Tyria guide... I would say the choice is nil. TDub is notorious for releasing the worst guides for all the games (plus they don't EVER update them), but attached is an image for the Tyria guide showing their 15-25 portion of the guide...
(!empty($user->lang['ATTACHMENT'])) ? $user->lang['ATTACHMENT'] : ucwords(strtolower(str_replace('_', ' ', 'ATTACHMENT'))):
tyria15-25.jpg
Yes, I have access to the guide, my member name is blurred out, but should give you an impression of how the guide progression is currently.