What do you think - Smart Mini Wireless Dolly

Inputs on this new gadget - Smart Mini Wireless Dolly. It's running a promo in Facebook:
https://worldwidefilm.co/products/smart-mini-dolly-with-remote-controller

I don't have anything like that, but it looks neat. Obviously, the surface you use that on has to be smooth. I could easily see using something like that to add interest to videos -- I have a slider, but it's not easy to get smooth motion for more than a second or two. That skate-like product is motorized, so it should be smooth for several seconds.

In Amazon you can get one "Andoer Motorized Camera Video Dolly" for $70. For that low price I think I will get one. If it sells 3 videos it will pay back for itself.

I've seen the same thing on eBay under a different name for a lot less but has to be ordered out of China.

https://www.aliexpress.com/item/33022647758.html?spm=2114.search0104.3.8.221b36b1f4b1rx&ws_ab_test=searchweb0_0%2Csearchweb201602_5_10065_10130_10068_10547_319_10546_317_10548_10545_10696_10084_453_454_10083_10618_10307_537_536_10059_10884_10887_321_322_10103%2Csearchweb201603_52%2CppcSwitch_0&algo_expid=5fbcf3dc-003f-4d2c-92a6-3f5fd9649e11-1&algo_pvid=5fbcf3dc-003f-4d2c-92a6-3f5fd9649e11

in 2016-17 I have used a similar but bulkier Sevenoak MS-01
those dollies are ideal for product shooting videos on a table.
and that's it.
Table or extra flat floor movement, never managed to make it work on any other surface.
But for it's usage it created perfect linear, elliptic or cycle camera movement.

Not sure if the one you want can handle the weight of a camera plus lens

:)