ADP Outside Sales Representative interview questions

Filled out an application online for the position and an HR recruiter contacted me via email to schedule a phone screen interview. He forwarded my information to the hiring manager and about a week later I went to the office for an interview with him. Pretty standard experience, no curve ball questions. They took about 1.5 weeks to get back to me about scheduling a day for a field ride. But before you do the field ride, you need to interview with 3 managers. They all ask the same types of questions. I send thank you letters and follow-ups to everyone I've met with. No one has reached out to give me any updates on the process. It's been about 3 weeks and not a single word. Do not get your hopes up if they do not contact you after interviewing, simply move on. Go to their competitor. I find it extremely unprofessional that they would string you along and then never have the decency to say they found a better candidate/etc.