Same as Jadzhia, my levels were slightly raised and very symptomatic but I wouldn't have been treated from the nhs until they were much higher. I've used blue horizon and medichecks and found that I had high antibodies, low vit d, folate and b12 as well as family history.
Low B12 is common with hashi's but my dad (hypo 10 years) had never been tested for it on the nhs. When I got my results he asked his go to be tested and his came back low too.
He's since asked to have his t3 and t4 tested as he's still symptomatic and slightly raised on 100mcg levo but they told him their lab don't test t3 and rarely/unlikely to test t4.
So I recently bought him a test for his birthday.
I personally prefer medichecks lancets and their doctors comments seem more personal as they consider your medical history or what you tell them in the questionnaire when you order. Blue horizon don't ask for medical history. I once wrote my symptoms in a comments box on the lab note but still got the same generic responses to results that seem to cover all possibilities. However it's not a big thing especially if you will be discussing with your own doctor or posting your results on here for interpretation.
Both have codes and deals on every so often so I normally go off price. I ordered a medichecks testing kit last week with a 20% discount code to keep for when I need to do my next one early next month.
My first gp dismissed my results but was willing to run tests of his own. He was horrible to me when I explained my needle phobia and I've never really had a good experience with him in 24 years so I changed gp to my dads surgery.
When I got there the first thing I told her was why I'd changed gp, how he was with me and why I'd had private tests. She said it was fine and she'd check if her nurses could do it any other way to make it easier for me and save me money.
I went back last month and got a different gp and explained again and she read my notes. She asked if i wanted her to go and check if the nurses had an answer yet. I told her I'd prefer to continue going private because they can't test t3 and t4 and I'd prefer to know exactly how I was responding to treatment and she said fair enough and that was that.
Before I was convinced it was all in my head, I was just lazy and must have been eating too much. But it was constantly in the back of my mind, I couldn't understand how I was putting on so much weight comparing myself to others in my family and what they ate and why I can't cope with a full time working week. Then had the guilt of not earning/working as much as my OH and embarrassment of my body changing completely when my diet hadn't. I still have the guilt and embarrassment but not to the same extent and the people I tell are more understanding.
For me it's been worth every penny. Good luck