Hi Kevin,
The new styles make a stark contrast between the thin sides and heavy top. Not much in the way of blending to 'smooth' the transition. I'd say the density in those photos is 80% or better. I think when you wear a style like those so don't have to be concerned about a smooth transtion between your own hair and the hair system so in that respect it makes things easier. . On the other hand with that style you'd have to make sure that you get a good attachment since there's no longer hair to cover up any gaps in the attachment. So a plus and a minus.
Here's a phot of one of our customers pulling off that look.
Regards,
John