Hotel ColbertvsHotel Guynemer
Both hotels are recommended by professional reviewers. On balance, Hotel Guynemer ranks significantly higher than Hotel Colbert. Hotel Guynemer comes in at #6 in Casablanca with accolades from 3 publications like Lonely Planet, Rough Guide and Frommer's.
Hotel Colbert
 Rough Guide
Rue Chouia, Casablanca, Morocco
From $0/night
 Star
 "Conveniently located – one block from the CTM – and surprisingly large, though the hotel sign is difficult to see." 
Hotel Guynemer
 Rough Guide
 Frommer's
 Lonely Planet
2 Rue Mohamed Belloul, Casa-Anfa, Casablanca 20000, Morocco
From $0/night
- Free Internet
 - Room Service
 - Laundry Service
 - Concierge
 - Restaurant
 - Kitchenette
 
 Star
 "A fairly well-appointed, family-run hotel just off Rue Prince Moulay Abdellah and Av Idriss Lahrizi in the most architecturally interesting part of town." 
 "This Art Deco, family-run hotel is a traveler's favorite and beats all others hands down for friendly and helpful staff." Full review
 i 
You'll need to book your stay ahead of time, and you can also request an airport pickup.
 "Regular rooms are comfortable but slightly cramped (especially the bathrooms); suite rooms are well-sized." Full review