Hello,
After a while driving an H151-equipped Cruiser and having had the chance to drive the much talked about H55F, there is a couple things to say.
The H151 is clicky to shift, and sometimes it feels hard. It takes a while to get used to it. Acquired taste? Maybe. However, it can stand a lot of punishment, both on- and off-road. I still have to see how it ages, but I like it.
On the other hand, the H55F is softer when shifting, friendly if you like. I wish the ones I drove had a more powerful/less tired engine attached to them, but it felt good. No wonder it has so many fans. It slips out of gear as it gets old, but it is something to expect when proper care is not applied.
Nevertheless, I do miss the H41's granny-low first gear.
Having said this, I recommend the H151.
I am getting used to the clicky shift, but that is another story.
Juan