With respect............it's not a simple question.....
Each has it Pros/Cons.....for an experienced bettor.....
I'll go over my "two cents" in no particular order:
Stations: LOW LIMITS.....HARASS WINNERS/LIMITS......BUT BEST DOG #'s.....The low limit....common man square......book......
William Hill: Best selection.....Tennis/MMA/Soccer....Parlay AnySports.........HARASS WINNERS.......SHUT DOWN WINNERS.....WORST CUSTOMER SERVICE.....HIRE ONLY SPECIAL OLYMPIANS......IMBECILES....But have the best selection....Most comprehensive tennis betting in Vegas......Book bets early....Best In running wagering.....But they Past Post.....They will hold prospective bets for minutes on end.....unless they move in the BOOK'S FAVOR......
SouthPointe: Limited Selections on Odd Sports No Tennis....Rarely MMA.....But in Big Four Sports....High Limits.... Up to $2K.......No questions asked....Opened 23 hours.....Reliable App.......Best, Mot Educated Ticket Writers and Staff........Nice spot for Big Four Sports......No in running wagering.....
Westgate: App from 1993.....No Wifi with app......No phone charger with app.....Sharpest lines....High Limits.....2nd best selection......Best for halftime Money Lines.....The only book for halftime Money Lines in CBBALL......Experienced Staff......Pretty Good Hours....Rarely in running wagering....except for major TV games........
MGM or Harrah's: Big Touristy......Corporate......Waste of Time.........Except if your meeting visitors to Vegas on the fly........
CG Tech: Big Limits......Corporate....Touristy......Troubling Management......Legal issues.....I stay away.......
Best Wishes!
Hope it helps!