Saturday a week ago I practised wet exercises with the Silhouette (Nigel Foster's) in the pool. I preferred, taking into account this time of the year, not to play around at sea but use a warmer environment . 
Underneath I would like to share my experiences:
Rolling.
Although the kayak did not have the foam-blocks for knee-support (of which I am a fan), I could roll easily.
I rolled in 2 ways: rolling while bending forward on coming up and using the hipflick and, the other way, rolling up while bending to the afterdeck.
Both methods worked fine, but especially while coming up on the afterdeck I was happy with the seat-construction featuring a bulb as back-support instead of the usual backband. This way of back-support was very pleasant for my lower-back, as my backbone was not punctured by the cockpit-rim anymore.
Rolling with the paddle extended is not my strongest technique, but in the pool I managed to come up without any effort.
In general you can say that the Silhouette can be rolled normally. I only know of a few other kayaks that are easier to roll.
Sculling
I found sculling a bit difficult at first. After some exercise however I could perform the sculling better. But I trust that with a dedicated knee-grip in the cockpit, I could be able to scull for longer periods.
Rolling with sculling strokes at the end of a roll, while surfacing, works also fine.
Next exercise was the re-entry&roll. The re-entry was super as the was no interfering backband. Rolling up was also a piece of cake without any notion that the waterlogged cockpit counteracted with rolling up.
The X-rescue benefits from sloped bulkhead just aft of the seat: you only have to lift the bow a bit to empty the kayak almost completely. Entering the cockpit was no problem as the perimeter-lines were at the places were you need them.
To enter the kayak I also tried the heel-hook-method for the first time, but I think I will have to practise this method more often to be able to trust it out at sea in waves. Climbing on the afterdeck was no problem but while turning around to enter the cockpit, I felt a bit vulnerable. Imaging waves around, I have my doubts!
High braces can be carried out normally.
I did not perform any low braces as I did plenty of them out at sea.
Transporting a person on the afterdeck: I forgot to try this in the pool. So this will have to be done at sea later or at another pool session.
To be continued.