Read reviews for the Longsleeve Dry Top by Immersion Research as submitted by your fellow paddlers. All of the reviews are created and written by paddlers like you, so be sure to submit your own review and be part of the community!
The only issue is that the neo neck did get a bit damp inside, but there was no flowing water.
'Taint perfect, however, and I have a couple of suggestions for IR. The velcro cinch tabs on the outer waistband point backwards; it they pointed forwards, they would be easier to cinch; there's not nearly as much leverage pulling backwards around the hip. The inner tunnel might benefit from being a bit loose with a cord cinch, like NRS; without that, there is still a bit of a "dance" getting the inner tunnel fully down over your butt. The wrists could use a velcro cinch on the coverings; I had to peel the covers back to get at the gaskets for flattening and sealing, which was a bit of a nuisance. (I think velcro wrists are a feature on some other, more expensive IR dry tops.)
But generally it's a very nice product. The outer fabric sheds water like gel coat; the seam taping looks top-notch; the feel for paddling is very comfy and it is overall quite light.