Hi paul100: I own and run a powerpod. Like you want, I use it on three bikes and just switch it over as required [a minute or two’s job]. I use it with elemnt bolt to see the data and record.
Likes: easily movable between bikes; easily transported too; seems to be accurate enough [see dc rainmaker on this]; can get extended analysis from add-on software; cheap [but as other meters come down in price, this is less of an advantage]. You can also buy a device to measure aero drag, if you want another add-on.
Dislikes: if moving between bikes, takes 10 minutes or so to recalibrate to the new bike; also takes about 10 minutes to adjust to a new road surface [with higher or lower rolling resistance]. The powerpod does sometimes seem to simply cut out and then reset itself – but then, judging by the comments on this forum, that happens to a lot of power meters too.
For consistent results you need to fasten the powerpod very securely to the handlebars / stem. Any knocks or movement means that the data are out for the next 10 minutes [until it recalibrates]. I use the k-edge fasteners, that hold my wahoo above the powerpod.
On a trainer indoors, this is essentially a virtual power meter. [I’ve never used it indoors, since I had a KK Inride and now a Stac Zero, both of which give power readings.]
Remember that it is all driven by speed and wind [with aero drag and rolling resistance calculated]. This means that you can have nothing on the front of the bike that will interfere with wind. If you want to do touring with a bag off the front of the handlebar, that might be a limiter.
There is a decent forum with answers to lots of common problems.
I hope that this helps. Personally, I like the powerpod, since at my level of riding it is a bit less pretentious than a full-on higher-priced powermeter.