What are your hotel standards? Simply stated, Choice-branded hotels tend to be rather hit-or-miss, especially in terms of renovations and amenities. Most hotels will give you a clean, comfortable bed, though checking reviews, especially for Quality/Econo/Rodeway, is a good practice. Many will also have a suitable breakfast, nice staff, and decently-renovated rooms, though others will have a decent bed but be otherwise very dated, poor breakfast, and mediocre front desk experiences. There's definitely some diamonds in the rough, but there's a lot more rough than Marriott (or Hilton, Hyatt, or even IHG.) Choice also has plenty of their own IT issues, and they tend to have less IT features than other chains (for example, there's no way to do online check-in, or use your phone as a key, at least on anything resembling a brand-level basis.)

If you're willing to sift through some of that, the rewards program can be very generous, especially with the promotions often available. It's quite possible to get free hotel stays at reasonable hotels every 3-4 stays with the promotions (though note that you need an even number of stays to maximize most promotions.) The IT problems generally aren't terrible, but you'll have some frustrating experiences from time to time. I'm primarily a leisure traveler, and I generally only need the room/bed to be clean and fairly comfortable. With that expectation, Choice generally fits the bill well enough, especially considering the cost savings.