Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Etymotic Research ER6i

Thse IEM sound very good,very accurate,good tonal balance.They block out noise as advertised. The company is very helpful at letting you try different tips ,so that you can find out what is most comfortable for you. They must get a good seal for you toget any bass and get good noise rejection.The only downside if you use these dayly is the expensive filters and ear tips.I dont use them alot,they are mainly for trips,and mowing the grass.In thse uses they block the noise without having to turn up the volume to ear damaging levels!I rate them as a 4 because of the associated cost of the tips and filters $15 a set!.The company really needs to reduce the prices on these items.