I am thinking about switching to Usemywallet since EwalletExpress went under.  Any feedback with them?

CHECK this thread out,

http://www.latestcasinobonuses.com/onlinecasinobonusforum/casinos/just-to-let-everyone-know-quicktender-visa-option-is-back-working/

I use QT to handle my winnings from free chips.  I used to fund it, when everyone was accepting Mastercard, using my ATM card.  Now, I don't have VISA.  I got my invite from Cyberbingo.
I have to wait for the balance to get up to $100 to withdraw, and it costs $30, so I end up with only $70.  But, it was from free chips anyway so it's all profit.

Transferring from your account to your casino is superfast and easy.  Some of them store your account number; others you have to look it up each time as it's not the same as your login ID.

Some casinos get your cash into QT really fast, some take the normal 3-7 days.  Some casinos require a deposit before you can withdraw to QT.  Some don't. 

All in all I've had no problems actually using the QT option.

I think you can use those prepaid Visa cards, but you have to register your cards.  So, if it's not reloadable you may have to do a lot of chatting with customer service to remove/add card numbers.

I don't know about the short window since I have not used the depo method in some time.  You can also set up ACH deposits.