I've worked in Power stores since 2008 when it was rolled out. Lots of glitches and issues initially, but now it's fairly efficient and nice. Don't get me wrong, there is always room for improvement and some days our CPO people are idiots.
Overall, some stores are worse than others, that's a no-brainer and just life. We are freed up to engage patients more, which boils down to being a very high paid cashier at the point-of-sale. Downside is, despite having to not type ~90% of our scripts, corporate gives us barebone help so a Power store doing 400+ a day will operate with 1 RPh and 1 maybe 2 techs on any given shift. Having to man 2-3 front registers, a drive-thru, phone calls, fill scripts, give immunizations, call insurances, etc etc with 1 RPh and 1 tech does become a struggle at times. All the while making sure the CPO peeps who are remotely typing/verifying our scripts are doing so accurately.
It has it's pros and cons, personally I like it, but improvements are needed across the board.