My experience is different from adventue950 and davidmc.
Both my wife and I bought the BMW Kalahari suts with the Gore-Tex liners in January of 1997 and used them for 3 years 9 months, (61,000 miles)and never had any problems with the liners.
In October of 2000 we bought the BMW Savanna I suits but we kept the liners from the Kalahari suits to ues in the savanna I suits.
We have used the Savanna I suits for almost 5 years (95,000 miles).
For the liners that is 8 years 9 months (156,000 miles) and we have never had them leak.
The Kalahari shell did hold some water but not a lot. The Savanna I, if you shook it out a little hardly held any.
"Breathability"
If you get hot take the liners out.


adventure 950 said -
"Remember most gortex products absorb water on the outside and become heavy and take ages to dry, the so called waterproof liners usually give up after a year so then the clothing is worse than useless and they tend to be heavy and hot for summer. Also claims of breathability are somewhat misleading as you sweat to death in them in hot weather especially in town or traffic."
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Water and other substances flow down hill.
The pants liners go over the tops of your boots.
The elastic cuffs on the jacket liner goes over the gauntlet on your gloves.

davidmc said -
"The concept of the fragile gore-tex liner being inside is a good one, as it is protected by the rugged outer layer, but wet gloves are tough to prevent with this design. You may have a similar problem with an inner waterproof layer in the pants and water running into your boots, unless you can somehow lap the inner gore-tex layer OVER your boots."
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After this summer's heat we are going to get new suits, with more vents. I am getting The BMW Rally II and Jean is getting the Santiago
with new liners.
John