If it were my child, I'd start researching alternatives.
I'm not saying you haven't done this in the past, but please go visit lots and lots of places. Drop in unexpectedly and ask to visit, so you can see how things 'really are' not just the 'bells and whistles' tour they give everyone. Talk to all the staff members, even ones in older kids' rooms because one day your kid will be there. Don't feel badly lingering there just to watch and see what's going on - a good daycare center won't mind one bit whereas a bad daycare center will try to either usher you out the door, not understand why you are observing what's going on, or try to control every aspect of your visit. It's your child and your money - they will be working for YOU, so you set the tone. Ask them what their philosophy is regarding sleeping, eating, crying, playing, etc. You should be able to get a feel for the place right away. I went to a center that had a sparkling reputation and is considered to be an 'elite' place. 5 minutes into the visit I wanted to leave - it felt so cold, institutional, and robotic. I wondered if any of them ever grew attached or had an affinity for their students or if they were just concerned with marching them through their paces and keeping the kids on their strict, inflexible schedule. Like other posters have said, go with your gut instinct. If it feels bad to you, you'll never feel comfortable leaving your son there.
That being said, my son is in daycare and I feel like we have hit the jackpot with our decision. We absolutely love his lead teacher, the staff (the older kids' rooms know me and my son already and say hi!), and pretty much everything about the place. I will admit, at first I had the whole "I'm his mother, I know best, and no one can do the job better than me" mentality. When I finally came to my senses and realized that the people who work most closely with my son have been working with infants for at least 7 years (in other words, they've worked with dozens of babies and have seen it all), I developed a wonderful partnership with these women who have essentially served as mentors for me in helping my child grow and develop.