I've used them for almost 10 years now without any problems! Their customer service has always been excellent and they are very responsive to emails or calls.
The only downside would be their price increases. They have gone from $4-$5 per month when we started with them to about 11 dollars (in US Dollars) right now which is outrageous! Also, it's hard to get an actual person who can resolve issues instead of just getting automated voice mail messages all day long. We use hostpapa because they support our website well, provide fast responses to email inquiries, and offer great prices compared to other companies offering similar services.