I have one similar to that which is OK for thin combos, but some bass gear is of sufficient depth (dimension wise) that it moves the centre of gravity over the front leg and the whole thing becomes very unstable. My Puma combo fell over , so I stopped using it.
Another option is to consider a folding workman's platform from Toolstation or Screwfix, comes in handy at set-up time for putting up lights and PA stacks as well as being an amp stand.