the bioseal is great....i love mine and would be sad if i ever forgot it at home.
However, it is known to break down latex seals faster....so i would suggest using it only with a neoprene neck seal (that is, unless you are looking for an excuse to replace your latex neck seal....in which case, the bioseal may be able to break it down faster for you ).
bioseal, greatest thing ever, love it, havent had any prob with breakdown, 2 yrs on same seal, i love bioseal...