I unfortunately can only affirm with my experiences: well engineered exterior feel, but plagued by unreliable hardware. My Surface Pro 4 managed to simultaneously experience flickergate and battery expansion, and the soft surface of its keyboard crumbled where my wrists touched it. Its refurbished warranty replacement then pulled off the signature die-a-month-out-of-warranty. The bottom half of a Surface Book in the family also died without any recourse (with no official replacements sold).
Naturally, the unsupported, glued-down screens also make them some of the least repairable devices on the market. At least they had the sense to make the SSD removable—aside from saving you if spontaneous failure catches you out of a backup (as Microsoft will wipe all devices sent in for repair), it's also the only part salvageable from a "PC" of such form factor.
That said, the Dells we've had seem to very reliably suffer from broken hinges.
