Being a confirmed sceptic, I would say "Probably"
There are only two affordable units on the market, as far as I know, and the other one has far fewer features and isn't being actively developed. It does, however, have certain advantages according to your point of view, and is popular with spotters.
I bought my RadarBox in March, and have generally been pleased with it, but suffer from a number of problems which most other users don't experience.
There have been software updates since then, with many new useful features, but I (and others) still experience some problems, and some features still don't work properly (or have ceased to work when they were OK with previous versions), which is probably true of most software packages.
On balance, though, the support here seems to be rapid and well intentioned, and the product has tremendous potential, so I would say, faced with the choice, buy RadarBox but keep injecting input here if you do - it does help things to be improved, eventually.
DC