There are threads on these properties...
Quick overview, with my ranking having stayed at all four properties.
1. Casa Habita (formerly Casa Fayette)
2. AC
3. Westin
4. Aloft
5. AC Expo
The larger AC here is fairly good with the pool not usually very busy and two blocks from excellent restaurants.
The Aloft is a club on weekends in the pool area and noise is an issue as the building was poorly constructed. Noise from bars across the street as well.
The Westin is perfectly fine but I do not love the location and the service is very hit and miss.
Casa Habita formerly Casa Fayette...love/hate feelings. The staff can be great, pool is small but works. The location is good, with lots of restaurants/bars nearby.
AC Expo is attached to the oldest outdoor mall in the city which is a plus and minus.
Uber from GDL can be an issue, so be subtle during pick-up to avoid any issues with the police and the taxistas.
Enjoy Guadaljara!