about the additional features, look in the settings if there a options grey out -> they will be there in the paid version (at least there where some grey when i logged in with guest mode)
i haven´t tryed gladi suite and bought i a while back then before hunter drood and warrior was released, but i think tuanha where one if not the first who had updated his routines after the major content patch.
so if you raid and you can´t say to your raidleader give me 2-3 weeks after each content patch which affects your class you should also take that into consideration

+ support for all 3 specs is nice if you just have to switch for a boss or rar mob and you don´t wanna restart hb.
there are also good predefined settings and mouseover options (healing raid / mushroom / leap for warrior) and you can even load a different setting setup by just pressing a hotkey -> i.e. turn off aoe and burst for a phase and then back on....
also for healing it does a good job for my needs, but since iam just "casually" raiding and i got 6 chars i tend to do rnd nhc / hc runs in which you don´t have that much requierments (got also oracle II / leaves / stars and so on)...
if you use it i just recomment you to check / read every option so you know how and why it will behave in a certain situation and save these settings.
also with questing 6 chars MoP->WoD i used mostly his routine and had close to 0 problems and the ones i had might also be caused by the profile not sure if singular would have behaved differently / worked.
monk with 640 / 645 2h weapon (no luck there) -> 20k dps tektus 27k+ as faar as i remember, same for my owl which just destoryed everyone 30k on tektus with healing enchants not really the best trinkets and so on.
i know its a lot of money but i don´t regret it -> still haven´t tryed gladi or yrb2 (pve) + not that much pvp experience just some bg farming for ilvl -> 615 and capping arena with a friend