I'd recommend IVF Zlin. We spent several years in treatment here (PCRM Vancouver and then Victoria Fertility) with no luck. We tried 1 DE cycle in Zlin and while it wasn't successful, we are going back in November to try again (age and uterus issues). They were wonderful and very professional - the standard of care and level of treatment exceeded what we had in some of the clinics here. Happy to answer any specific questions you might have. Also, if you are willing to travel off season (our last was Jan/Feb, this time it's early Nov.), the travel costs, hotels etc. are very reasonable. You can have a fantastic vacation and the treatment for less than a single cycle here.
We looked at a lot of the clinics in Prague, Brno and Zlin. We narrowed it down to Brno and Zlin based on a number of factors including costs and success rates (I had a massive spreadsheet going at one point!). I spent hours reading the forums for both clinics but in the end went with my gut. No regrets.