These were really convenient for us. It caught the extra drool teething caused and it stayed available at all times. Much easier than having to track down and wash teethers every time my son threw them down. Easy to throw in the wash. Cons were the fabric part did fade quite a bit after washing. Also there is no gel in the teething nubs so they can't be chilled.
Really Good, my daughter did use the teething bit too, so i do recommend these, every baby is different and may not like them whilst others do.
No improvements. Affordable, efficient and good quality. Satisfied and will recommend.