The tria is a piece of junk!
Most hair removal works better if you're on HRT. Reason being, the HRT is playing a big part in reducing the hair all on it's own, certainly where body hair is concerned.
HRT won't work the same on hair for everybody, some people experience very little reduction if any....
Any and All lasers need coarse dark hair to work. An honest laser practitioner will tell you this but it's not good for business. Beard hair is coarse, some body hair, pubic and underarm can be coarse, not everyones is. Chest and back hair generally isn't coarse enough neither is leg or arm hair, there are exceptions.
Where a person is using more than one method or means to remove hair (because that's what's being discussed) It is virtually impossible to accurately attribute success to exactly the means or method that is doing the work (removing the hair). ie laser whilst on HRT.... If someone is throwing money at hair removal they are obviously going to attribute any success towards that method. Everybody likes to think they are getting bang for their buck. Bear this in mind when you're taking peoples opinions into account...
I did experience a degree of success with professional laser treatment for my facial hair. My last treatments were at full power, I asked but they wouldn't turn the machine up any higher. In some ways laser is it's own worst enemy and here's why. Normally early treatments are at lower power settings in order that skin reaction can be assessed and client tolerance can be built up. At lower levels the hairs won't be zapped enough to kill them completely. Some of them will be stunned into a period of dormancy after which they will start growing again. Other hairs will end up finer (no longer coarse) or without pigment (no longer dark enough) or both. In short the early treatments can render some hairs unsuitable for later treatments where higher energy might have had a better effect. Very catch 22.
Back to the the tria: At full power this unit might well reduce you're chances of success with a professional laser because it might, at best or worst depending on your standpoint render your present hair situation (if only in part) unsuitable. That is, any dark coarse hair may end up finer or lighter and therefore unsuitable for laser....
We're all impatient to get rid of unwanted hair but some short cuts will prove costly in terms of finance and time and ultimately success.
I'm on a roll now so here's some other things to consider

I will add that I'm very biased towards electrolysis.
Some people will say that they are finished and clear but they still go in for top ups???
Some people will say they are finished and clear but they still have some lighter finer growth but no shadow??? This is obviously ok for some but it is misleading. Having no shadow any more is enough for some but it isn't "clear" and it's a situation that will require some maintenance to stop it becoming obvious. Especially on a bright day when viewed from the side, it's not a good look.
A "clear" result is a smooth face NO more hair apart from.... peach fuzz which is typical for a lot of women. Peach fuzz can be removed with electrolysis if you so desire, it cannot be removed with laser.
Over time as we age

perhaps as we decrease our HRT NEW follicles may come to life producing NEW hairs. This effect is common amongst menopausal women. As their oestrogen drops off and the body tries to strike a balance, testosterone can effect follicles and turn hair production on. NEW follicles can be spurred into life, this isn't regrowth. This can be managed with electrolysis without the risk of firing up additional adjacent follicles. This cannot be done with laser which isn't as precise (pinpoint accurate if you like).
Where success stories are being claimed please allow time (at least a few months, ideally way more) before you excitedly stand up and say "It's worked, I'm clear" I've no doubt there are degrees of success with laser maybe even "complete clearance" but I'm skeptical based on both my own experience and that of others ( away from Susans, apart from transgender and fairly well spread between people from all walks of life). If you've posted before saying "it's worked" please for the sake of others perhaps re-visit your post and update, be specific and keep everyone up to date.
Hair removal is something I've been experiencing and studying for a few years now and it's an absolute F**king nightmare, make no mistake. It's a world full of BS and unfounded opinion and bias. It's been a real struggle staying motivated and wanting to become part of the hair removal world because it's a world of deceit and lies. Some of it is innocent and happens simply because people are poorly trained and poorly informed. They do bad work, give bum information and create bad customer experience because they don't know any differently. ("and why is your opinion any different" I can hear you thinking

)
It bugs the pooh outa me when I read some of the crap that abounds on the web, in magazines, in beauty industry trade literature etc etc. I'm just trying to help a few here people here that I can associate with....
By the way in case you're interested here's a link to a youtube clip where you can watch someone who is without doubt, Top of the game. I can't say enough good things about this lady, she is in a league all of her own. When I first saw her work I almost gave up because I know in my heart of hearts that I will never be this good. I doubt vey few practitioners are....
If it's possible for you to get to Spain for treatment feel free to get in touch and I'll give you her contact details. She is very busy though and you will see why. This lady will have your beard removed faster than anyone, less hours being treated and with long block treatments as few as 3 visits....
By the way if she asks how you heard about her say Darren put you in touch