The literature on the Credit Swiss BVG fund states...

The investment objective of the investment group is to achieve a
reasonable return in CHF. The investment group invested in
fixed and variable values in CHF, in mortgages and
in indirect real estate investments. The proportion is at
Real estate and mortgage for at least 60% of the
Net assets amount.

The small type on the bottom of the page says ...

Both the Credit Suisse Investment Foundation and Credit Suisse AG does not give regard to the contents and the completeness of this document
and disclaim any liability for losses arising from the use of this information. Unless otherwise stated, all figures are unaudited...

It goes on to say ...

Every investment involves risk, especially those of value and profit fluctuations. Detailed information about
Risks in securities trading is the brochure "Special Risks in Securities Trading", issued by the Swiss Bankers Association. To note
is that historical returns and financial market scenarios are no guarantee of future results.

There appear to be two major risks; the first is the value of the CHF they are hedging their bets on; the second the stability of the housing market; which as I am sure you are aware has collapsed more then once in the UK in the last few decades. (Currently struggling)...

Is this a good place for your pension.... maybe, maybe not. Depends how old you are; how much money relative to your assets we are talking about; and if you can afford to lose it...all.