CL is subjective and a really personal thing. We stayed CL at BWI last summer and we liked it okay (me more so than DH, who was not thrilled), but it really isn't our thing. The lounge is awesome--having the extra space to sit is nice, and it did help with our breakfast costs (oatmeal, pastries, hard boiled eggs, coffee). It was nice to have snacks, and of course the appetizers and desserts were great. But if you are in the parks most of the day, you won't be taking advantage of those things as much, since they are only out for a limited time. Breakfast, of course, comes out early, so it's easy to eat before hitting the parks.
That said, DH and I were both kind of uncomfortable with the attention you get from the CL CMs. It's all positive, of course, but we found we don't really like being waited on like that (like I said, a personal thing). We don't care about turndown service, don't need or want extra help...it's just the way *we* are. So even though we said we wouldn't book CL again, we did this year at AKL, solely for ability to do the Sunrise Safari (which I am SO EXCITED ABOUT). Plus, it'll be a fun surprise for the kids. They know we'll be at AKL, but don't know we booked CL. They loved the lounge last year and asked if we could stay CL again; we had said no, so they will be shocked.
Anyway, if you think you might like it, try it. You probably won't save a lot of money, but it's a nice experience, and lots of people find they love it. I'd say if it sounds like something that's up your alley, give it a shot! If you don't love it, or find it wasn't worth the money, then just don't book CL again.
ETA: My ILs booked BC CL last year while we were at BWI (which was sold out) and loved it so much. It works with their touring style--not in the parks as much, slower pace. They liked it so much they are doing a three way CL split this year--GF Sugarloaf, AKL (with us), and then BC again. Again, like I said--a personal thing.