Westropp Knee Brushing Boots and galloping?

[checkmate1]

I've just bought my girl some westropp knee brushing boots, which if anyone dosen't know is a brushing boot with an extra bit up the front which protects the knee in event of a trip/fall. I was always told that knee boots (traditional ones) aren't good for cantering/galloping/jumping in, so i bought these ones and by the look of them I think they would be a good hacking boot that cantering and galloping in would be fine. Anyway, somebody said to me last night that they'd been told they were no good for fast work, so any thoughts/experience please?

 

[Ezme]

At the stables where I ride they are standard issue for hacking. Incuding cantering/galloping and the odd log.

 

[Thistle]

I use them at all paces with no problems.

 

[checkmate1]

Great, thank you!