I personally DO like Signature. It is really only beneficial if you know you will spend more than the membership fees in accommodation each year. (I have the monthly one at the moment but would prefer to sign to the annual if a discount come along again.)
simple pros:
1. What I pay per month I essentially get back in reward points.
2. I get extra reward points every 4 months and every year.
3. I get status points bringing me closer to SNUs.
simple cons:
1. you are committing to spend a certain amount (cost of the membership) and more (see point 2), on your bookings each year.
2. Can pay for stays with the reward points, but not if registered for a promo, so spend commitment for the year will actually be higher than the membership fees.
For me, I like it. I think it's a take it or leave thing. I want to stick with it for sure though if I am able. I like getting the bonus reward & status points
Just waiting for Accor plus to sort out my membership - that's my priority membership.