I had a consultation with one of Premier Windows sales people and he explained their services, but wasn't pushy trying to get us to agree to more work than what we called about.
After the consultation, my husband and I agreed to let them do the work (especially since the second company never came and a third simply walked around the house and mailed an estimate with no explanations).
The sales person continued to work to set up the deal, even calling us on his vacation to see if we had any questions, and then emailing the estimate to the home office. They were not pushy and just did everything we wanted them too. It was great and I would recommend Premier Windows and Doors to all my neighbors.