My regular meter is Metered Light's Pocket Spot or the Sekonic L758 for Large Format, and a little Gossen DigiFlash for anything else, so I was keen to get the Lumo for it's small size, rechargeability, colour temp measuring and general innovation. It does all those things, but I can't say I've warmed to the menu system yet, and have found it confusing in the field - the simplicity/accuracy of the Pocket Spot makes it my go to, and the wireless triggering of the Sekonic makes it the perfect studio beast. The Gossen is just so easy to read (especially now I'm in my 50's and my close vision has gone South, boo). I will keep trying though, as the Lumo is really nicely made and packed with features...
Marc!