I use MyBMI, I've found them to be good so far. I think I've always paid £199 per pen though.
I am so happy with my results so far. I didn't notice much at first but I'm now on my second month at the 1mg dose and the change in me is incredible. I eat breakfast, lunch, and can only manage a small amount of dinner. I have no urge to snack any more, no sugar cravings, no boredom or emotional eating. I feel as though this must be how "normal" people feel about food. I've lost about 18 pounds and have another 10ish to lose and it feels totally achieveable. I'm actually really happy that it's taken 3 months to lose 18 pounds, it feels sensible and sustainable. This is actually the best thing I've ever done!!