I drank Holba for a bit but there are better Czech beers. Radegast and Staropramen, for example.
I didn't say Holba is the best beer - it's not your regular beer simply - and I was told what I drank (10-er not the 12-er - I mean extract) was one of the most bitter beers in the Czech Republic - I don't drink beer for alcohol content but for the taste - that's why I drink it once in half a year mostly - and Holba is like a punch into your liver (not because of the alcohol content 10-er is quite weak actually only 4 per cent alcohol) - you actually feel like your bile canals relax and open (well I guess you won't feel that that intensive if your liver is not significantly burdened and your bile tracts aren't a bit 'cramped') - the beer made me cringe - it's almost painful to drink it - that's why I treat it more as a medicine than a recreational stuff
this is very different to Becks for example which has strong but bearable hops content and drinks quite smooth
and now compare these to Carling hehe ;) - there was a time I could drunk draught Carling to my desire (whatever amount I wished for and for free) - I think I ended up with just a couple of pints - always thought Strongbow cider was much better (also could drink it as much as I pleased) (but I was told it gives you a bad hang-over once overdosed)
as far as I can recall Staropramen is quite mild, well-rounded beer, can't really remember the Radegast