Our experience with Mobiscroll for the past 30 days has been nothing but great. Their trial version is a great way inspiring confidence. This is how we made sure that subscribing to it was worth the investment.
After the trial period, we were confident enough to buy our own license. Since then, it has been great. All our date pickers are now using it. We are also using it for most of our dropdowns, especially multi select.
The only issue is that they do not yet have Searchable multiselect dropdowns, but we hope they are working on it.