ergonomic mouse

HELLO GOOD PEOPLE OF THE FORUM

not sure where to post this question, but. would anyone care to comment on their experience of using an ergonomic mouse, after working 10 years 40 hr weeks,with a pc over the last 2 years developed wrist pain, i had used a brace , which helped. but still had some discomfort, i happened to walk into a Staples & saw a vertical mouse

My employer , was kind enough to purchase one for me, J TECH DIGITAL, it seemed to solve the wrist pain, but after about 5 months of use, i developed thumb pain, upon researching, i found that the design of some mice, cause , whats called grip force issues, holding the mouse like pinching something caused the thumb issue. i have been looking at several manufactures , but if anyone had any similar problems, or perhaps any suggestion of a mouse that worked for you

thanks in advance