I don't want to rain on anyone at all, but I would speak a word of caution with regard to Czech bred fish in general, not just apistos.
I have imported for several years and have also dealt with a number of European sources. One problem which I would have to consider major is the high possibility of of bringing in fish tuberculosis from Czech bred fish. This is a very common disease that I have seen in a variety of fishes coming from these sources. In talking to some colleagues such as David S, he said that Uwe Romer won't touch Czech fish (literally won't touch them) because of their reputation. It is pretty contagious stuff, and on top of that it incurable so you can really be taking a gamble. Inexperience folks who see the opportunity to get into a variety of "rare" fish at low prices, without dealing with importing wild stock will often jump at Czech bred fish, but beware because even the importers may not be aware of this issue, and the Czech supplier sure isn't going to look for trouble. Aside from that you will, on the majority, be dealing with very inbred stock from a Czech resource. While some suppliers have been better than others in terms of health and overall quality, I have invariably seen a strong degree of inbreeding issues when dealing with Czech Apistos. They probably don't get a lot of new blood over there very regularly and they may have to start off with a small group in the first place. Admirably they are able to keep a pretty regular supply of some rare fish available, but what we end up seeing is a lot of deformities and health issues. Compared to the stock I've seen from good breeders right here in the US, their cacatuiodes are atrocious, to name one. Many species display stunted finnage, stocky bodies, bulging eyes and so on. Apistomaster also had a good point. It's not always the case, but often you will get nice big fish that are impressive to look at and might be perfect for the casual collector, but to a breeder this would not be the best starting point.
All that said, I have also gotten some very nice fish out of Europe and have been very happy to have them, but when you average it out they are not the ideal resource for getting Apistos and it may have its inherent risks. If you are not overly ambitious in your Apisto hobby don't worry about it, and if you like your fish that's the most important thing. Just don't let anyone tell you that Czech fish are the best way to go--especially if they are the ones that want to sell them to you.