I was also skeptical of priceline, but not so anymore.
I just used them to book a hotel in seattle for this weekend. They have a deal currently where they'll send you a voucher for the first night free. Since I'm only staying 2 nights, that works out to 1/2 price.
So what did they get me.
The Westin Seattle for $118 a night.
The best price on that hotel I saw elsewhere
was $129.
With the first night free, is works out to
$59 a night.
I'm happy.