Invaluable lifesaver. Definately do it. Don't think it will be a breeze, I found it incredibly hard but very rewarding.
I've used mine lots mainly when flying over the sea with no horizon. It is often impossible to tell which way is up. On a couple of occasions when flying with other experienced pilots the A/c has managed to roll 60degrees with neither of us noticing. Its odd to see a ship at 2oclock high. In these conditions you have to fly on instruments in CAVOK to avoid doing a Kennedy.
All of the channel island clubs are recommending IMC before any long overwater flights are attempted.
Have fun