I just bought a Spider V 30 and like it very much for the most part. I sounds better than my Spider IVs (75w and 150w). So far, I only have two complaints.
The power switch is located on the rear where it's very difficult to reach from the front. I solved this my connecting a designated power strip and using that to turn the amp on/off. Connecting Spider Remote to IOS devices requires a Thunderbolt connector. I phone connect fine but my iPad 3 won't connect at all. Therefore, I'm faced with buying a new iPad or using a tiny screen to operate the app. This really sucks. Note that the Marshall Code amp may not have as many features, but will connect to their IOS app via Bluetooth. This allows connection without a cable of any kind. Line 6 seriously blew it on what should have been a far better option.
The only other dis I would give the Spider V series is the wireless use of a G-10T (not on my 30 watt version). The G-10T is a $95 optional device and a great option. However, you can buy a G-10 complete system for about $179 and use it on any amp so it's not much of a selling factor to make you opt for one of the higher wattage amps. For instance, the 60w is about $100 more than my 30w. Other than extra wattage, the only extras for your $100 are a 10" instead of 8" speaker, looping and wireless access to the G-10T (which, as I mentioned, is $95 extra). That means that, if you really want the G-10T, you'll spend $195 more than for the 30w version.
My biggest beef is by far the lack of Bluetooth to connect to Spider Remote. If Marshall can do it, Line 6 should have.