Black Diamond tents are single wall tents, fine for dry and cold conditions, but due to their single wall construction there can be condensation issues in any other weather.
I owned a Black Diamond Firstlight for several years- strictly a one season tent- Winter and it did do pretty well with winter conditions and it was light (for a Winter tent).
I sold it recently and am going to try the MSR Access 1 out for my solo Winter tent and should be decent enough for shoulder season stuff as well
