The parallel arrangement takes a little getting used to. I switched to a Kinesis Advantage, which has parallel keys, and it took me about a month to get up to

The parallel arrangement takes a little getting used to. I switched to a Kinesis Advantage, which has parallel keys, and it took me about a month to get up to speed with it - and another month to get comfortable on a "normal" keyboard again. After that I didn't have any problems switching back and forth, however.