Cambridge 302/303 users - feedback please

The new glider is ordered and we consider what vario
to instal. Having had a 302/303 for 6 years; 4 repairs
and some doubts could you please let me have your experiences
of the instrument re the following to assist in our
decision - Borgelt or Cambridge.

1. Reliability
2. Wind calculation ( Intermittantly final glides are
mad numbers and the wind is at that point very wrong
)
3. On thermal entry it overreads then calms down after
a half turn ( Maybe our plumbing)
4. We have never been convinced that netto relative
works.

Many thanks , Colin