Jem, I bought one of those when I was pregnant and saw it in Woolies one day and have been waiting to try it ever since! Like you, I'm holding off on the solids until 5 1/2m which is about 3 weeks away (how time flies) Luckily, it coincides with DH being home so he can be part of her first dinner. I've got the spoons and cereal ready to go!
Speaking of cool things, I bought an Airwrap bumper to stop Autumn losing her arms and legs through the railings the other day. If you haven't heard of it, it's a bumper made of mesh so if they press their faces against it, they can breathe through it. Handy as she is all over the shop in her sleep now.
Autumn now rolls until she runs into something and can't go any further - amusing, but it means the start of the 'running after your child' exercise I'm afraid.