i visited both Fairfield Inn and Residence Inn. both hotels are Marriott group and located on the same premises. walking distance is less than one min. excellent hotels! rooms are so clean, have small kitchen, big refrigerator, and small eating space. you dont need to buy dishes or cutleries. staffs in front desk are nice. buffet are fresh, lot of choices, and yum! i prefer Fairfield Inn if you want cheaper hotel and almost same quality, but they dont have kitchen in the room.

We stayed a week at the Res Inn in Santa Clarita for a 35+ family reunion in the SF Valley area. We were upgraded to a 2 bedroom suite for me and my daughter's family of 5. Worked out great except for the upstairs guests who did a lot of running across the floor above us (We were in 214). They graciously moved us to the same room type on the 3rd floor the next day and it was smooth sailing after that. We can't say enough about the friendly staff who accommodated our every need. The rooms had a full kitchen and was cleaned and freshened by housekeeping each day. The pool and jacuzzi were awesome and crystal clean. We did several "midnight swims" with the children and they loved it. They also have a firepit with comfortable chairs around it, but we preferred the jacuzzi! The inn serves a breakfast each morning with fresh fruit and the usual breakfast fare. Not so sure about those eggs though! It was average, but free so who's complaining?!! Never made it to the manager's reception. I also noticed that so many of the other guests were pleasant and fun to chat with. We will definitely stay here again should we go back to the area. We felt right at home!
I will suggest you keep vigilant when you're using the freeways. There was a LOT of construction with some signage missing and we got lost a couple times. Otherwise, it's a nice area for walking, shopping and just vegging by the pool. We got very good at this!

Stayed for 2 nights while visiting Magic Mountain. Very easy check in. I made a request to change my room type and they were very accomodating. The hotel was very clean and well maintained. Everything in the room worked perfectly. We stayed in a studio and it was plenty spacious. The breakfast buffet was reasoanbly good. Food quality was average. Would have liked a little more variety. Basically 1 egg dish, 1 meat and a little fruit. They do have a waffle maker to make your own waffles. Plenty of seating in the breakfast area so it din't feel overcrowded. The hotels is about 2 miles from Magic Mountain and there are plenty of restaurants nearby. Just booked a return stay for next month.

Useful place if you have a family and great to have a fridge - otherwise - travelling solo - I'd rather have a standard hotel room. Rooms have everything but are dark and totally soul-less. TV signal lousy, beds and baths fine. Tiny pool (not unusual).

What did surprise me was that the free breakfast (which they started to clear before the deadline). Choice was limited (OK for free though) but the scrambled eggs looked like they'd been made from egg powder - you cannot get such a uniform colour - or cement-like consistency from real eggs....
BUT serving it on polystyrene plates with plastic cutlery - what do they think we'll do? Go Greek and start throwing the plates on the floor and dance around them and steal the cutlery?
Unfortunately as I stayed over 2 trips of Thursday night to Tuesday I didn't experience the Manager's buffet but hope it would be better than the breakfast. However, stacks of cheap places to eat within walking distance, and better places a short drive away.
Front desk staff were cheerful and helpful in every way and offered help when needed - and they were the heroes of the stay - otherwise - if I'd not used Marriott points for the stay I'd have checked out early and cancelled my second stay.