We used Tower for our financing with a 2.99% rate. It hasn't been easy but it all worked out in the end. Felt frustrated that I had such a small window to proceed with financing from the time I got a VIN assigned (1/28) to when I had to take delivery (2/3)(1 week). Some tips and review of our experience:
Ordered a Model Y on 1/13. Applied for loan on 1/13.
Applied for membership 1/18. -Should have done this right away. My advise here is do this first/immediately, upload picture of both front and back of ID, and then call member services once a week minimum for an update. Eventually on 1/31 I got someone to look into it deeper and they sent over a docusign for me to finalize the membership on 2/1.
Call the loan services dept frequently. They can also eventually provide you the extension of your loan officer once assigned and you can leave them messages letting them know you've submitted all docs, are waiting on approval, taking delivery of your car on x date, etc. Also, the POA document is available in the resources section of the Tower website. You need to sign it with a notary. You can leave the account number or ID blank and Tower will fill it in later.
I didn't get callbacks from my loan officer until today 2/1, the same day I signed the membership document. She said she was ready to close on the loan and overnight the check. With 48 hours to spare until delivery.
Might also help to know that we got nervous and applied for Tesla financing yesterday thinking we would need to allow time for that approval. It was approved instantly. So if you have good credit and good income, I recommend proceeding with Tower until last minute, because you can easily/quickly be approved for Tesla financing if Tower doesnt come through on time. Since our Tower financing came through just after we had given up, we were able to text our Tesla contact at the local branch where we are taking delivery, and they had it switched back to our third-party financing within an hour.