I don't mind real hackamores at all, but for a number of reasons, I don't like the mechanical leverage devices aka so called 'english-' or 'french-hackamores' but as with a bit or any other bitless bridle, a lot depends on how you ride & how well trained your horse is, to this gear as with other, as to how good/bad it is in most normal situations.
What I don't like about them... They are leverage devices which, esp if noseband thin &/or hard, &/or there's a chain for the chin strap, &/or shanks are long, &/or it's fitted low on the nose... etc, etc, can be extremely harsh. Even nose-breakingly! Despite their name, they are not great for English riding, riding with 'contact', direct reining & finer specifics can be unclear, crude - better for loose rein Western style riding. Accidents happen - horses get tangled in reins or such - and serious pain/injury is just as likely with one of these devices as with a bit. Many(IME) horses don't like them, IME and as with a bit or anything else, you must take the time to introduce it and get the horse comfortable about just wearing one, before using it for control.
Especially if a horse needs it's teeth done, the constant pressure on the cheeks & nose can be uncomfortable or even painful.
If I had to choose one of these to use, I'd go with a very short shank, a padded, wide, flat nosepiece and a padded, wide-ish flat chinstrap.