We have two tripp trapps for our eldest two (they're still using them aged 6 and4) but this time bought a Safety 1st dupe called a Timba from Amazon. It's been excellent to be honest. It comes with straps and table included. I bought a cushion insert from a different website. I'm really pleased with it.
The IKEA one was fine but I wouldn't buy another one (had one for my middle child before giving in and buying a Tripp trapp when she was about 12 months)