aUI is based on the concept of having one morpheme per phoneme. This means there must be a large amount of phonemes and that making the correct phoneme is extremely important for correctly sending your message correctly. It has 31 phonemes/morphemes.
aUI is meant to be written using a custom orthography, but unfortunately, this orthography is not typeable using Unicode. This means that most people writing in it use the romanization which is inconvenient as it often requires distinguishing between the same letter, capital vs lowercase, for very different meanings.
Grammar in aUI is very free form and is primarily about determining the best way to combine the symbols to create the most meaning. Unfortunately many of aUI's combinations are not intuitive. For instance jE - equal matter, means liquid. Other combinations make more sense for instance jEv - liquid action means to drink but it can also be expressed as jEt-gev[liquid-Toward-Inside-move],jEt-gov [liquid-Toward-Inside-Life-Action], or jE-togev[liquid-Toward-body-move] this also means that there are many ways of expressing the same thing which you can use depending on context.
aUI relies heavily on known suffixes for instance to indicate the finite-indicitive-past form the suffix -pAv is used.
aUI uses SVO word order.
The main problem with aUI is that either you use small words and accept a high level of ambiguity or use large words and communicate too slowly to be practical. In practice, this would be solved through convention, which would naturally increase the amount of new words new learners would have to learn to understand the language so it would no longer be quick to learn.
aUI's stated goal is "to further intrapsychic harmony as well as interpersonal and intercultural understanding" but it partially fails at this due to its phonemic inventory being hard to use for all speakers.