Which CRM to choose for the training center (trainings, courses)?

Question

CRM

Good afternoon. A recommendation on a CRM system for a training center is needed. We conduct training programs in various formats (trainings, lectures, seminars, online courses), individual work.
We have found several solutions that position ourselves as specialized for our industry:
My class
HolliHop
Alpha CRM
Tallanto
Marker
But nowhere are there live customer reviews, especially critical ones. Perhaps you have gone the path of choosing a system and now you can act as an expert and talk about the pros / cons of these or other solutions. We want to reduce the implementation time and choose the right product. We have standard training center processes (there are subscriptions) and we need a standard solution without further modifications.

Answer 1

The oldest and most terrible = Moodle
Didn't watch: Canvas LMS and Open edX

Answer 2

You can reduce the implementation time very simply - choose the simplest and easiest CRM. There is no need to purchase specialized systems, because it is enough to adapt the standard CRM.
First, make a complete list of required features and options. Then cross out of them what relates to accounting systems (accounting systems), then cross out what you can definitely do without. As a result, you will have clear wishes, according to which you can already select something.