I’ve being using these (from dark farm) for about the last 18 months. For my needs they work well, I tend towards 9-10L batches so cam put a batch in a couple of 5L kegs, or what I often do is put five litres in a keg and the rest in bottles, which ensures I have some variety (while I have 10 mini kegs I only have two tap units).
The biggest downside is of course that CO2 bulbs are an expensive way to buy CO2, a pack of 30 including delivery is about £23 including delivery, so about 77p a cartridge, typically one of these will dispense a 5L keg, so I assume two will be needed for a 10L one. I do not force carb, but just use priming sugar, you will get a slight layer of sediment, however all but the first maybe 100ml draws clear in my experience.
The biggest advantage for me personally is that they fit in my kitchen fridge without issue, meaning I do not need a dedicated beer fridge if I was using 19L corny kegs this would almost certainly be the case. You would need to check the dimensions of the 10L mini kegs, as I assume they are a fair bit taller, so may not fit in your fridge.
For me personally mini kegs are ideal, and suit my needs, but the ongoing CO2 costs are not insignificant. If it suits your needs go for it I have found Dark Farm to be a reliable supplier for mini kegs, and the tap units are well built. You can also buy additional mini kegs elsewhere as the fittings all seem quite standard I.e, I have a couple of two litre ones I bought on ebay which I am finding great at the moment for putting beer bought from commercial breweries in, as they are currently doing delivery in 2L plastic bottles.
Mini kegs suit my particular need however when I was looking into it, I found their was very little in it between a corny keg setup and these if you look around, it’s just that I don’t have the space for a dedicated setup hence my choice to use mini kegs.