If I'm being picky, uKit has quite simple templates, a limited choice of colors, a primitive design, issues with customization, and widgets that don't always work correctly, and so on. However, this is a problem not only with this builder but with most similar ones. Therefore, if something doesn't suit you, you can always reach out to the developers, who will create a website according to your wishes for a reasonable fee. The builder is suitable for those who want to create a website on their own but lack sufficient skills or funds. And uKit is very helpful in this regard. I created a website for a furniture store (on order) using this builder, which can be called a business card. I admit that the similar templates and limited customization options were a bit of a hindrance when creating the site, but this can be managed. Visually, the site looks attractive, and its content and promotion allow it to rank high in search results. Whenever I encountered problems, I contacted customer support, and they always helped me resolve the situation. Although sometimes responses took a while, that's understandable—I’m not the only client, and there are few operators. The site itself works stably and has never gone down for external reasons. As for the load from visitors, I can't say, as my field is not related to that. But I am completely satisfied with the builder.