How would you do it differently?

I booked a DEMO session, very eager to look at the platform and system they have. 

Started great with the welcome and chit chat. 

I started to get quite frustrated when she kept asking me qualifying questions & performing need analysis on me WITHOUT having a CONVERSATION with me. I feel like I am being questioned and I have to answer all those lists of questionnaires before I can see the DEMO. 

Have you been in a similar situation before? 

15 mins passed. 

I almost wanted to hang up the call, till she finally showed me the demo. 

I am impressed with the platform, and all that the platform and system can do (that is the reason why I booked the DEMO as I was already convinced when I browsed the website earlier). 

I started to get so excited about the features and use case and asked a lot of questions. 

2 mins left. I couldn’t ask more questions (but I am ready to discuss commercial details but ended up booking another hour for another DEMO session. 

I was thinking if I am the one doing the demo, how would I do it differently?

1. Always allocate a buffer of 15mins extra for each call instead of doing a back to back call with other clients so that when the customer is ready to engage more, I am ready. When a client is ready to buy, I must be ready to sell (probably postpone other things to close it on the spot) 
2. Instead of asking the pre-set series of need analysis questions one by one, turn it into conversation by repeating the last word from the customer and probe more questions from there. 
3. Blend in need analysis questions throughout the demo session instead of separating it into 2 parts. 

How would you do it differently?