I have the Summit Hoodie and the Bora fleece which are designed to go under the Fuera Ascent and Bora windproof respectively.
Neither is waterproof in any combination particularly, relative to Analogy. I've got a Quito and its never actually failed. I tried the SH+HA last October in Illinois and it leaked bad on the windward side around the neck, the hood wet out and then dribbled to the SH which didn't take much pressure for it to give up and I got wet. I tried the Bora combo about a month ago up in Oregon near-freezing heavy rain and the hood leaked again but for slightly different reasons, the hood on the Bora isn't very good and I was getting rain coming in through the floppy gaps around the face.
I think these ideas are more about having a fleece with water-resistant properties which works well with matching venting (more for pockets access in my experience).
If so long as you're expectations are not too high then you'll be fine, e.g. take a fleece because you like the fleece, a windproof because they're handy and a shell to use if its warm rain or to put on over stuff if its hoolie type conditions.
Even with Quito, which hasn't failed on me, i'm usually carrying a windproof to use for when its not raining and I put it on over the Quito for a bit extra insulation and to cover zips.
Before anyone cries Paramo fails, shells fail too in different contexts. I only own one shell currently a Marmot Mica its not put on often but its there, not taking up weight to add if needed.
The Bora fleece due to the stretch side panels and the hand-warmer is good general fleece, long body, but flappy hood. The SH just looks good in black, but its terribly short, but has tigheners on the hood. Different pros/cons.
Marten, don't have SS but have Notch and sag can be removed from the 4 pegging points when sat inside. The photos of the SS suggest similar but its just looks harder to reach from the inside. If you add your own guys to trekking poles and feed through the vents then can place sliplocks to take out any slack there also.
"Thanks for that. Any thoughts on whether a silk liner would somewhat prevent body damp from playing havoc with my down? "
It could make it worse, on the one hand it absorbs damp itself rather than it getting more into the down, and it can more easily be aired but it also makes you warmer so sweating more. I use one all the time over my whole body and just tune how much of me is inside the down bag to regulate.
I noticed PHD is doing a small discount on a lined outer so you can optionally add more external damp protection, don't know if that gives an optional way to add external damp protection when needed, and like the silk liner, easier to dry separately. Theoretically, an external liner will tend to raise the temp of the inside of the outer layer of the down bag, so make it drier to then make the condensation occur on the inside of the external liner bag, so keeping it a bit further away from the down, but also it will tend to trap damp in. Anyone used?
I ordered the Minim 300, long length, full left zip. By adding the full zip I can also use it as a blanket on warm nights, which really renders this thing suitable for 4 seasons.
The zip. I got zipless Minim 300 and really you don't need zip, just have less of you inside the bag e.g. wear a windproof top and sleeping bag just upto waist. Zips snag and weight. I got zip on Combi and despite attention its zip snag and you can see that's going to be the wear point.