Just wanted to post an update on my order, as reading these posts made me worry a fair bit.
I ordered an UMOriginal+ on the 3rd May 2015, sent a message to UM after i couldn't log in around the 23rd May, and was worried my order was lost, I got a reply within 2 days (one was a bank holiday here, not sure if that affects it), and all was fine.
I received my order on the 1st of June 2015, so about 4 weeks, (Lead time was 4-6).
I would have liked more updates in the mean time, such as a possible delivery date or something. As 4-6 weeks is a long time to wait considering payment was taken at the start, But other than that it was all very smooth..
Hope this helps.