My experience: Though I should clarify that I'm only at RPL now, but working towards PPL as time allows.
I carried out my ab initio training at an RAA school in SEQ, predominately in J170 but also J160 as well a little bit. I passed my RPC flight test at 24 hours and promptly did nothing for three months due to an interstate move and new job.
I went to the local school which used to be do RAA and GA, but now only does GA, "RA planes are no cheaper to run anymore so there's no point." I was expected to get the run around a bit, but after a few hours of flying around doing manoeuvres and circuits my instructor was happy with my flying. And I must say after the Jabs the PA28 that I am now flying is super comfortable, stable and all round pleasant.
We sat down and formulated a plan to work towards RPL, and he insisted on doing the two hours of instrument time, which I'm still not convinced is strictly necessary for a non-nav endorsed RPL, but anyway, I really enjoyed it actually :) We also did some fairly "severe" upset recovery, certainly way more upset than anything I'd done in RAA. Especially when under the hood... Recovering from an inverted stall half a dozen times when you can't see anything is a sure way to get air sick that's for sure! But again I'd say it is worthwhile and certainly not a waste of time or money. Hopefully I never get myself in such situation but if I do, somewhere in the old noggin is a method to get out of it...
A few more circuits at a very congested, high stress Class G aerodrome with three RPTs and four water bombers operating into at the same time and voila flight review signed off and I'm good to go: 5.7 hours, 2 of which was instrument flying. This may seem excessive for some, considering that RPC and RPL are meant to be equivalent, but I feel it was all very worthwhile, pushed me further into stressful situations and made me a better pilot. Time and money well spent. Now onto Navs and PPL.