Hi @nicoter,
Thank you for your feedback.
We are really sorry to hear that you have faced such an issue. We always try to provide as many bug-free products as possible but sometimes things happen out of our control since there are tons of problems or incompatibility out there with WordPress plugins and themes. We have maintained a good WordPress coding standard to build our plugin.
We agree with you that the free version has limited features but you can display the latest and the featured products slider with the features which are given in the free version without the pro features. It would be great if you contact us for a feature request so that we could consider your request.
As the plugin works very well out-of-the-box and we are continuously working to make it better. We are really sorry that the plugin CSS is overriding your theme CSS. We will definitely work on it. As the plugin didn’t harm your website that much, we hope that you’ll consider your reviews to inspire us so that we can make it full of advanced features for our valuable users want.
Thank you very much!