i only book by phone.
i do that so i can talk to a TM and get current info on any promos that are going on that i am not aware of.
since i am a loews member, i call the loews number which in turn, am transferred to the universal booking number.
you can call the universal booking number and by pass loews.
you will get the info you need from the TM you talk to.
if you book online, you might miss out on specials.
if you have special requests, you can have it added to your ressie if you book by phone.