Instruction: Carefully assess the user's review for any strong expressions of sentiment, either positive or negative. Based on your analysis, select the most fitting sentiment option from the provided list as output.

Input:
Bought one ball for myself - ended up liking it so much that I bought 5 more for my extended family (ages 13 - 65).  Some of us are using it for fitness and core conditioning. Others find that it makes a great "chair" to wiggle around on/balance on in front of the home computer. My senior age mother loves that fact that she can sit down and get up off from the ball easily - also finds it handy to stretch out hip joints/legs while doing partially seated lunges, etc. After two months since purchase, we're finding the ball seems to be holding up very well under moderate daily use - also retains air pressure quite well. Need to be a little careful rolling around on the ball if wearing clothes with zippers and metal snaps as these might "scuff" into ball surface. Otherwise, a great product!

Options:
A: very positive
B: positive
C: neutral
D: negative
E: very negative
Answer: B: positive