I'm not exactly a bike nut, but as the owner and regular rider of three of them, I think I could be safely described as an enthusiast.
When the warm weather arrives, my mountain bike starts getting a lot less use, and my beloved Nirve cruiser starts to rack up the miles again. The weather is in the mix because this is a single speed bicycle and its top speed is not exactly high velocity. Pleasure riding only - this is no good when you're in a rush or just anxious for the commute to be over.
Nirve is a pioneer of the beach cruiser bicycle, and this style of bike is making a big comeback right now (note every hardward and department store now carries one). This California company uses all top quality parts and you feel it in the bike - in the ride, and also in the carrying it up the front steps, because all that steel is heavy!
I haven't ridden any other cruisers to compare, but I'd have to say Nirve has the geometry of this one down pat, at least for my body. You just feel like you're gliding. It literally makes you swoop around in the road (traffic permitting of course).
This is not a bike for the shy and retiring, however. As you can see from the picture, Nirve turns these things out in capital S style. I have yet to ride my Island Flower without getting at least one comment from the sidewalk and even out car windows.