Yeah, nothing is perfect. It's just that when I spend a lot of money on a cordless microphone system, I expect it to have minimum issues.
I set up my Shure BLX at the last wedding I did, and I was getting a lot of feedback in the gain. I couldn't even use it. I didn't have time to trouble shoot it, so I tore it down, put it away, and I set up my older Shure PGX system, and it worked fine. I don't know what is up with this BLX system. I thought I was making a great choice buying it, but it's been less than fair thus far. I am thinking Shure is trying to make products cheaper these days, and cutting corners. I only had some issues with my PGX system a handful of times in the past, and they only started to occur after someone dropped the microphone denting the grill on the top. Usually the issues are an occasional signal drop, but when someone is making a speech, and a signal drop happens more than once then it's all the DJ's fault. I need my equipment to work well.
The NADY brand is an American company. I don't think the DKW duo are made in USA, but I know many of their older microphone systems were, and everybody I ever met who owned a NADY mic in the past said they had great experiences with them. The NADY receiver boxes are light, and sort of cheaply made, and that's probably why it died in the heat.
I always have carried a cheap cordless set, and a more expensive Shure cordless set with me.
Overall, with all of my experiences over the years, I can't truly say that spending more money on a Microphone system means the microphone system is "BETTER". The $329 Vocopro UHF 3205s have last me the longest, and also had the very best sound. They did have some signal drops here and there over the years that seemed to come out of no where. Normally a 1 second drop and I could never figure it out. Only flaw the system really had. The Shure PGX has been pretty good, and is a "HOT" microphone...can really pick up sound from further away with the gain turned up in some situations. However, it's sound quality is OK at best...pretty flat sounding. It has last me about 5 years at this point. The BLX has been less than good so far in the 8 months I have owned it. The $50 NADYs were a great value, and did their job well. Had to hold the microphones within 6 inches of mouth to pick up voice clearly, BUT outside of that they had a strong signal, long battery life and dependable.
I might give the GTDs a try this time around. The reviews make them worth giving GTD a try.