With textures like the chair, curtain, floor, carpet - you could as easily use the Poser Surface and just tick the Firefly & Superfly buttons - Superfly picks up more detail in the textures automatically.

Another option is to use the Poser Surface - tick only Superfly - and then add the Glass BSDF from Cycles into the reflection color. From there you can set the reflection strength as you like it. It will give you a glass look - for the wine glasses. It will give you a reflection for the floor (add in the texture as you normally would - just add the Cycles as the reflection color).

Your render settings in Superfly - as long as it's not grainy, you're good - I only use the presets. There's nothing special you have to change.

The black on the glass is a Superfly feature - it's not a setting. It does render glass very black. Ditto metal - the more metallic you go the darker it gets.

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