Need to be more flexible.
930895
I bought these for my husband, as he walks at night.  They light yo great, however, they don't fit well.  If you move your arms while walking they will slide down your arms.  He tried them on his biceps and his forearms, no luck.
3060760
The plastic is not rigid enough and has a tendency to flex and tip if you are not very precise with your placement
4163429
Not enough modifications for limited range of motion that sometimes comes with age.
1864120
Not very flexible. Not able to use it in the place and direction I need. The product however is sturdy as advertised.
1999258
The idea is there but it's not as practicle as you would like. Trying to do all of the configurations it's just not that snug. I found the elastic bands at the ends to be uncomfortable.
3973339
Like previous poster has said , needed to tighten the back.
18750
So far so good; pretty flexible, but a bit tricky to tighten.  A better fitting at the end or a different plastic protector might help.
628506
These are a challenge putting on, due to the hard rubber, does not flex very easily, there was some custom grinding to get these to fit, but after car felt great, could've taken to the track and it would've handled great.
1576461
Work but the band is too thick for me an it's difficult to tighten it because the band is too stretchy.
108241
The bands 'work' but are not as flexible as a regular fit bit band.
VERY square and not bendable around where the device goes.
1807521
They're not as strong as I need.  They bend too easily for my limited mobility.
3696520
Fits, works, BUT is slightly too flexible so that it flexes and bounces more than desired AND more than competitors' products.
4884455
Need to have a new design to secure the strip getting loose.
2205359
It works well but it doesn't have a firm structure which makes it hard to put on and set up.
2017841
The lack of flexibilities regarding the position made me want a more versatile stand. I didn't feel that the laptop was secure enough as it can tilt backwards.
3795759
Too right - had to stretch out a bit before it was truly functional.
4893561
Easy to put on of course. These do need to be readjusted fairly often as they start to slide off. If you have trouble bending over these are probably not your best choice. That's the reason for not giving 5 stars.