There is one big thing about tiles that people tend not to understand.
That there exists a Renault Clio and it costs 20k, and that there exists a Mercedes S which costs 100k. But a tile is a tile. Yea, right.
HOWEVER, looking from the customer's perspective in one hand I understand it is very hard to know what is a quality material and who to trust for advise and laying in the end.
Been laying glass tiles "worth" 650€/m2, the guy said to me watch out when laying it, it is a very expensive material. Looking at it I wanted to cry, the difference in dimensions, a bow, etc.
It is hard to say anything from the pictures, we would have to see tiles in person, try how to cut it. Clips are a must, but can't do miracles. It is still possible to do a neat job with a crap tiles. BUT the general problem at the tiler's, you put price per m2, after you get low budget material you spend twice as much time and effort to put it together, resulting in no revenue.
Don't know what to do or say in this case, folks, when buying tiles ask someone as much reliable as you can get, and check the builder's works before tiles.
Been there, done that, had stairs one week ago that seemed perfectly fine, when measuring it 4cm height difference on some spots. What to do or what to say?