Although I am interested in testing the wallet I haven't done so because of my day job and other work related items.
I will try it once I get some free time and let you guys know the experience of it.
Try to find out whether it can be used at any normal store where they have a QR code for UPI payment. I doubt that it may not work and I fear the money might get stuck. If it does not work then what the heck should we use it for? The most embarrassing part of UPI or Credit/Debit card transactions is when the bank's server gets busy and starts declining transactions. In such an embarrassing situation, this digital rupee should come in handy otherwise I do not think there is any use of it for me.
As of now, you can only use eRupee for making P2P transactions. So the other party must have eRupee wallet inorder to receive the money.
I think the merchants haven't started to use eRupee yet because of lack of awareness.
So it will take a while for merchants to accept it and until that we can only make P2P transactions with other people.