I was very impressed with the way the relationship of Sherlock and John was depicted at the end of season 2 and they picked up on that nearly perfectly in TEH. Any interaction between the two felt authentic and very, very genuine, I loved it, it made me want to see more to explore their relationship even further.
But the rest? Like ... those cut in "made up" theories about how he survived were ... funny, but strange? And the "case" was really not a case. My boyfriend and I sat there in the end wondereing what exactly we just watched. There was not much Sherlock-Holmes-deduction going on for that case and the off switch of the bomb was ... I don't know, kinda lame, too. 

Hi Bithya, like so many others here I'm from Germany, too.
You definiteley need to see the rest of s3. You'll see that s3 in general is a bit different from s1+2. And you need to see the special, The Abominable Bride, if you still haven't. I was totally speechless, because I was expecting everything but not THAT.

Welcome to the forum, Bithya. I can tell you that TEH is my least favourite episode so far but I think that the other two episodes are well worth watching - and completely different from TEH. You should really give it a try.