It was great from the moment I got it. Can be used straight from the box. Basicely plug and play but if you want to change things, the learning curve is easy. Dual function controles are easy. The DPS is great. No optional filters to buy. Ecxelent sensitivity and selectivity. Great Rx audio and adjustable Tx audio. I have a Ts850, it beats the 850 and that imo is hard to do. The noise reduction ability is fantastic! It blanks powerline noise to nothing let alone pulse noise. I realy can't say enough about how great it is!