I use them as my kegging option and they work fine. You need to prime them just like a big bottle (I bulk prime) and I have not found any issue with flavour differences compared to bottling. Only picks up yeast in the first 500ml or so then comes out clear. Fits easily on a shelf in the fridge.
When I can justify getting a fourth fridge or chest freezer I may convert to SS kegs but for now these work well for me.