I just bought the strider plus 3 wheel model, but since i've come home i've had a friend tell me that the 3 wheel ones aren't any good - is this true? has anyone on here had any probs, i put bub in both models and preferred the feel of the 3 wheel and it was a bit more compact, but i wont take it out of the box, ill go back and swap if it's known for it's problems my shopping buzz has officially been killed! :'(