Works great in gig situations.
I've no insights regarding home network interference as a). I have an 8.11n network b). I use cables for home practice and band rehearsals (can't think why you'd want to go wireless at home!?).
I have used this for nearly a year now and it does the business. The range is good. I haven't played in a venue yet where a walkabout in the crowd has caused my signal to drop. The most difficult part is playing in time with the band due to sound delay! Ordinary on-stage use is superb. The guitar signal is clear without any degradation discernible.
My only complaint would be the naff belt/strap clip on the transmitter. I'm about to make a pouch for my transmitter with a belt loop on the back and a hole for the jack.
Its a little pricey (especially compared to its big bro' Line 6 Relay G50 Wireless Guitar System
). When I bought mine it was the only affordable digital option. If I was buying again I would research the system made by JOYO, but would need to know if it sounded as good as the G30.
Battery life is good when using high mAh AA rechargeables. You can use regular non-rechargeables from the garage on the way to the gig, if you've forgotten to recharge and don't fancy being tied down with a cable. I love the freedom that wireless gives me and love this digital system above all regular UHF systems due to its clarity of signal and lack of interference.
Buy it if its worth it to you to go wireless, otherwise invest in a good quality cable.