My experience was great. The sales people are really chill and don't try to put pressure on you. At the same time they're available and helpful. I was able to purchase several chairs from the show room and take them home to try out in my place. Then they credited back to me whatever I didn't want to keep.
As for the chairs themselves, they are super comfy and cozy, and you can't beat the price. They are a 1950s style that look really good and cute at the table, with a reasonable footprint. The metal piece at the back allows you to have a bit of spring as you sit back in them, which is really nice. The selection of colours and fabric are pretty fair but really I couldn't find the perfect colour in the range available (hence 4 stars instead of 5). I ended up going with the smoke blue with light legs, which is nice and fairly neutral but not perfect for my colour palette. The quality is amazing. I highly recommend Design Republic. I also went to EQ3 and they were much more difficult about purchasing a chair to take home and try, although they were willing in the end if I went to their warehouse to pick up And I wasn't that thrilled with their customer service. And I would say their prices are higher overall.