We currently use a mix of Meraki, Cisco, Dell and FS transceivers and DAC cables. All seem to work well in Meraki MSs and MXs. The only issues we have ever had is DAC cables in HP switches.
We did try some Ubiquiti hardware, but found the wireless management to be over fussy. The first switch we bought failed within six months, had to be sent back to the US (at our cost) for repair and then as the replacement was sent from Europe to us we had to pay import duty on that, meaning that the "free" replacement cost us the price of a new switch! We then found that the wireless firmware was sending rather a lot of data back to China without any notice or declaration, even when that 'feature' was supposed to be turned off, so needless to say that was the end of the experiment.
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