I've used Mark Johnson Plumbing at least three times in the last two years, and I will absolutely continue to do so. They're the ones I always call!
Their employees are always very friendly and knowledgeable. They are good at talking through the problem, and making sure you understand what's going on and what's needed to fix it, as well as the time-frame and cost associated.
Every time I call them, a real person answers the phone, which I really like, and everyone has always been very nice. Their pricing feels fair and always worth it, and everything's been working wonderfully since last they came to my home. 5/5 stars!