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:
Cheap and effective. I thought about spending $40 on a wheel that adds resistance but unless your core is crazy strong your body weight is more than enough to get the desired result. More fun and more effective than crunches. If you're an ab work beginner you'll likely need to work your way up to using this piece of equipment because I found this very difficult to do at first. But difficult = effective

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