Hi Mette,
The design is great and for me it looks like very well optimized.
One thing I'd add is on checkout page to remove the menu so the users can remain focused on filling the form.
About conversion rate optimization, I can help you with our services from www.vibetrace.com:
- collect email address, or show message on the intent of exit;
- send lifecycle emails, based on customer behaviour.
- send personalized emails with products for each user.
- give vouchers to
Do you do this kind of things onsite? Want to try some?
I also built a prestashop module, which helps with all the integration so you don't need to do anything.
If you are interested, just send me a PM or email us at hello vibetrace com