HELP - Spectra S2 breast pump thoughts

Nay
Hi ladies,
I'm looking at buying a spectra s2 breast pump and want to know how you like yours? 
-How do you find variable suction and speed settings?
-Can you sit up straight while pumping and milk goes into bottle or does it build up and you have to lean forward at odd angle to make this happen?
-Is it as quiet as the website raves?
-Has anyone fitted tommee tippee (closer to nature) bottles or bags to the system?
Any tips on additional fittings etc that I should take into consideration?
Thank you!!

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