The minimal incision and lack of an IPG is neat. You will have to cut down to fascia. It's higher risk of migrating inward, so you'll have to knot it from doing that.
I do think about it for high risk surgical candidates where I'd like to cut the implanting time significantly, as it would probably be ~30-50% of a conventional implant with not having to coil leads, tunnel, or create/close an IPG pocket.
I do think about it for patients where I don't think I'll ever want to replace an internal battery but they'll live too long for a prime cell. I don't know how I would feel in private practice about the revenue loss as it removes the annuity of an IPG revision, but I don't have those pressures right now.
I haven't put one in for SCS as I can't talk patients into putting up with the external antenna in the back, though the PNS players are generally game since it's a lot easier to deal with an arm or leg band. The antenna/lead orientation are a bit unforgiving.