I switched my landline to Perlico about 8 months ago and have never had a problem. I use NTL for my broadband so I can't say how good/bad Perlico's internet service is.
Yeah, Perlico did look better but now Euphony has a fantastic package - euTALK+15 for the first three months it's €1 and for that you get local, national and international calls to 20 detsinations (including UK, USA, Canada, Australia, France and others) for FREE!!! Plus there are reduced rates to a further 6 destinations and flat rates to mobiles. Beat that!