Are Apryse’s SDKs good?

I'm looking into Apryse's PDF SDK for a project that needs solid page manipulation features (stuff like merging, splitting, reordering, rotating pages, etc). Before getting a quote, I’m curious if anyone here has tried it out on different devices. I’m mostly working from a Surface Pro, and I’m wondering how smooth the experience is (especially in terms of UI responsiveness, touch interaction, or performance). Does it handle well on Windows tablets or mid-range laptops in general?