they are ok for in between pictures that aren't special milestones. I used to have all of our oldest dd pictures taken there when she was born. We just couldn't afford a "studio", then when Olan Mills was in all the K-marts we went there and their pictures were awesome! Then they closed and we started using sears. Sears usually has a basic package that is one pose. They recently changed their paper and I'm not too thrilled about that. We have gold cards(membership cards) and don't pay a sitting fee. Walmart depends entirely on who is taking the picture. You can get some real dud's taking the picture and you can tell because they just don't work with the kids. Other times the younger girls do a great job and are energetic. The good ones don't stay long because they move on to other studio's.
Have you tried taking pictures really close up outside? You can do some wonderful things with cropping at walmart's photo lab and they can also print wallets and all sorts of sizes for you. I took several months pictures outside. Cute blanket on the ground and something green behind. You really don't see what is around too much when the picture is nice and close.
I also take pictures at home when I am frustrated with the studio's and am tired of them taking the same ole pose. We get pictures taken often and I get sick of them not having any new idea's. Because of that we have started taking more at home then bigger milestones at the studio.
Hope that helps