I made no secret that migration was not easy for me. However, I must point out that support has been nothing but forthcoming and people have helped me above and beyond, which is not always the case at the other place. We have 20,000+ products, with lots of modules to add to the functionalities we need to run our shop, and most of the problems where caused by the following:
My own ignorance and inexperience;
Lots of third party modules;
Server issues, which I have come to learn, even with Prestashop, are not always easy to pinpoint and even when you think you have addressed it, there is still something lurking somewhere else causing it;
Despite the pain and the natural fear that comes from migrating such a big shop, all things considered, I do not regret it one bit. Backend is blazing fast. Front end is faster than it has ever been. SEO has improved by leaps and bounds. There is lots of little perks and functionalities that should have been in Prestashop that I discover almost daily...
I have looked for a long time for a solution for our ecommerce and I found that the prestashop environment seemed to offer the best balance of cost, scalability and possibilities of expansion. That is what drew me to the platform. It is not always easy, but it gives me the flexibility I need. I find that the TB people seem to share that same spirit. I have high hopes in the product and I also prefer it to starting from scratch with the Frankensteinization currently occuring with Prestashop... I tried 1.7 before deciding on TB and the amount of work to bring things up to what they were on 1.6.17 far exceeded the time I spent migrating to TB...
Fingers crossed for the future.