So, I tried the following four methods and here are my comments:
1. throw an extra phone in the suitcase and use "find my phone"
2. Trackr Pixel
3. Pebblebee Finder
4. Tile Pro (Style & Sport)
The "extra phone" theory did not work. The extra phone needs access to both LTE and GPS at the same time while it's buried in your suitcase. Also your main phone has to have access to LTE. It's rare during travel that all three occur at the same time. Also, I found the extra phone needed to be rebooted occasionally to be found - not sure why.
The Trackr Pixel clearly has the best Android app - the only one that tells you how close you are to the device. It is also the smallest and lightest of the devices and it lights up - which none of the others do. Were it not for the fact that the Trackr only works in the same room as your phone (even with doors open - nowhere near the advertised range) it would be my device of choice. That said, I decided not to return it as it will be useful for finding things in the home.
The Pebblebee Finder easily had the weakest Android app of the bunch. It is also the largest and heaviest of the devices. However, it does look cool - nice design, though too heavy. It has the same range problem as the Trackr Pixel - same room only, won't detect it until you're through the doorway. Due to having three things I didn't like about it - the app being the biggest issue - I returned it. They REALLY need to work on their Android app.
And lastly, the Tile Pro. Easily worked across three rooms in the house, which the other two did not. Tile Pro wins range by so much that it's really the only choice for travel. It also has the largest network for crowdfinding. The app is ok - doesn't show distance like the Trackr app. You can't change the battery - which really stinks. The Style is slightly smaller and lighter than the Sport. Only get the Sport if you like the looks and it will be visible - otherwise the Style is more practical.
In conclusion, I recommend Tile Pro for travel and Trackr Pixel for finding things in the house (keys, remotes, etc)
Note that I sometimes couldn't find ANY device when right next to it - I had to reboot the phone and all was well. This was the phone's fault, not the device, but be aware of that if it happens. I think my phone was conserving battery by turning off bluetooth when not in use. I suspect this is the cause of a lot of 1-star reviews for all devices. Since I had three different manufacturer's devices "failing" at once, I knew it had to be the phone.