I would reccommend Sheble's in Kingman, AZ. Many of the same reasons as above, quick, reliable training from a flight school that has been established for quite some time, inexpensive, and flat rate. Here at Sheble's our instructors make a lot of the difference. Two of my instructors have each taken at least 5 students from zero time to private pilot in 21 days or less, all within the last 2 months. Intense training and examiners on site make it ideal.
We also have condos available for rent by the bedroom for $30.00 per night. They all have wireless internet, satelite T.V. with a DVD player (for your home study courses), a full kitchen with all the utensils, pots and pans, and glassware that you will need, your own private bathroom, and a clothes washer and dryer in the attached one car garage. The best part is that your instructors live right next door.
In Arizona, we have no problem with weather delays and you will train at multiple airports ranging from near-sea-level (800 ft) to the mountain at Flagstaff (7000 ft MSL) so you fully understand Density Altitude. Being away from your business and family will actually work to your advantage while being able to submerse yourself in the curriculum without distraction.
And lastly, I wouldn't reccommend it just because I work here. In fact the only reason I work here is because I believe in the courses at Sheble's. I have enough hours to move on to the regionals or a cargo airline, but I choose to stay. As a flat rate school, you have a little more security that my instructors are not going to give you a lot of training that you don't need, they are going to train you to exactly what you need to know through the regulations, the Practical Test Standards, and the safe operation of the aircraft by the P.O.H. When you have the required time, you will be ready for a checkride and you will go on a checkride.
As a former student of Sheble's, I would reccommend it. As their Chief Pilot, I would damn near mandate it.