I have the Pioneer BDR-XD05B, it works great for um, accessing data on DVD and Blu-Ray, haven't tried it as a burner.
Not the cheapest out there, but trim, slim, and not a slot loader.
It's been replaced by the XD07B, and now they have the UHD/4K capable XD-07UHD:
https://www.amazon.com/Pioneer-BDR-X.../dp/B081R7HGV4