I will put some oil on the fire and will say no, it will not help you further.
Why not? This answer is easy, a fundies course (or intro to tech, or essentials from iantd) will not give you a cert that brings you deeper or further in a cave. And you also have already nitrox, so this is also not new.
If you are a diver that only wants to do courses that bring you deeper, further, till no limits anymore, then this course is not for you.
If you are a really good technical diver with good skills, so I would advice against it too.
But you know yourself best, so you know if you can do the skills the way you can find on youtube or so, and if it is not, maybe this course (or an Essentials or whatever fundieslike course) can maybe help. But again, it will only help if you are open for it and don't have limits in your body. I say this because I know a diver, full trimix CCR who had a problem with his ankles and tried fundies and failed because he could not do a proper frogkick. But he is a good and safe wreckdiver now. He never wanted to dive in caves, so on a wreck, a not completely good frogkick will not hurt.
And this is directly the reason why it maybe is nothing for you. If you are open to it and you know you can improve some things, then maybe it is. But if you are over 60, no ballerina anymore, but you can reach valves etc, you can dive safely on technical dives, then maybe your body is not suitable anymore for the skills required. One of the reasons can be that if you are diving for 20 years, you have some habits, you are older and stiffer and then it very very difficult to learn new habits. Only if you really want you are able to do. And I can say you, in just 4 days you will not finish then with a tech pass. You need to practise and come back. Is this what you want? If the answer is yes, go for it. If the answer is I don't know, then maybe save the money and go on a holiday for the bucks.
1 thing I do not like is that the course is too rigid with the theory part. I am a person that learns theory very easy and hate long days when I can read the stuff in less time than I have to sit there. This is in my opinion a very weak point of the course. Ok, in every course some theory is needed, but please give options for people who prefer learning on their own. This saves time for the student and will not harm the results. It is quite old fashioned nowadays to sit in a class the whole day. So if they introduce self learning/e-learning/etc, then maybe an exam and then 1 hour class for discussions or so, it would be a way much better option.
If you decide you have the money and you want to try fundies as you can learn from it, choose the right instructor. All instructors are human and even with the best instructor, this can be bad for you if personalities won't fit. For me an open instructor would be essential. I also have seen answers like 'this is for the next course', which I really hate. Or 'this is not for this agency'. As in structor you have to deal with students that have already been diving with trimix, solo, etc, you cannot wimple this away. They bring their experience and if you want to make them enthousiastic, an open discussion is very important in my eyes. So this makes maybe not every instructor suitable for every diver. But this is not within 1 agency, it is important for every course you follow. And of course the instructor has to be aware that such discussions will not fill up the whole course.
If you are instructor, then maybe the fundies is a nice course to see how things are teached so you can implement it yourself later while teaching. But this is something that is true for every course from any agency. And this makes that the need to follow it is maybe not really there.
Remember there are courses that are usefull like nitrox, trimix, cave. There are courses that can be usefull, but not for every diver like drysuit, sidemount. And there are courses that are just for fun as you don't learn better diving like biology, zombie diver, etc. I share fundies in the can be usefull. But only you know yourself.
So conclusion: you have to look to yourself. Do you have the money? Do you have the skills already or not? Do you want to practise if you are not ballerina anymore? Do you want to practise if you have already been diving for 20 years and maybe have 'bad' habits? Are you instructor and want to see how things are teached by another agency? Then you can do it.
If you think this course doesn't bring me deeper or further in a cave, I do already have the skills, it is expensive, I don't teach myself, I prefer e-learning and not class days for theory, and I hate practising things, then don't do it.
The course itself will not be bad. It is only the question if it brings you something that is worth the money. And only you can decide. But don't read only the 'yes it is answers', also take a look to reality about your skills etc.