I have used and recommned a K&M Euphonium (baritone) stand since I bought my Miraphone 5050 over 10 years ago. Honestly, it has been problematic, with other inconsiderate musicians still bumping into my horn a couple of times, along with the issue of it almost coming out of the stand. Just last week we played a concert where I could not use it and had to put it down on its bell. But like Baron mentioned "know your environment".
Euphs:
Miraphone 5050 Ambassador
Wessex Travel (Tornister) Euphonium 'Maly' ER154
Yamaha 201 Baritone
Mp: Wick SM4 Ultra X
Groups:
The San Diego Concert Band