I've had my AmEx TE for almost a year and have been a member since 2007. I started with a $2,000 CL and got an increase in April to $3,000. I spend on average $1,000 each month with amounts varying from $300 to $3,000 and always PIF and just set-up automatic debit on my account to make sure I'd never miss a payment.
I love it! And if you treat them right, they'll treat you right. I'd recommend reading MV's post on AmEx.