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:
I've used a medium strength power twister for a few years and I thought I was relatively strong. Although, I must admit that I've started using it more earnestly over the last few months.  So, I bought the heavy duty version with confidence.  Wow, was I mistaken.  It took me a month of looking at it and testing it before I could actually break and bend it.  I let it go once and got a slap on the chest.  I don't like the foam grips that much but harder ones would probably be bruising so I have a Catch 22.  It's tough, but when I can bend this with ease I will officially be a physical specimen.

I went back to edit this review.  Wow, I can now do 80 + reps with this power twister and my chest went from a barely respectable 41 to a fairly sizable 47/48.  Warning this will cost you money because if you use it earnestly you will need to buy new shirts.

My last update.  I can now do 100-120 reps my chest is 49-50 inches and my arms have increased by 1/2 inch getting close to a respectable 16 inches (very good for a 52 year old man).  I added push ups so now they are aiding and abetting my efforts, but this powertwister is what put me on the road.  I added another star since the what I orginally considered shortcomings have actually enhanced my benefits.

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