Probably one of the better hubs on the market. Bulbs have been solid for me too. I also use the GE Wink bulbs with the Philips Hue hub (they are compatible) where I just need lights without the color changing ability. The Wink bulbs run about $15 retail. The Wink bulbs are good if not perfect, they sometimes miss a command from the hub, the philips bulbs never do. The Wink Hub, while a crazy piece of hardware (so many radios) is, at the moment, a bit lacking in the software department.
On the ROI front I'm a bit of an outlier: my system is saving me enough money to pay for itself. I used to leave the 4 lights in my garage on pretty much 24/7 with 24w CFLs. My garage door opener light is pretty much useless and I wasn't fond of coming home to a pitch black garage at night. Swapped the 4 bulbs out with 4 GE Wink bulbs, and I now use the geofence feature of the Philips Hue software along with its timers. Lights come on in the morning at a set time, turn off when I leave, and come back on when I get home, turning off at a preset time a little later in the evening. The power savings from the wattage difference (9 vs 24w) and not having them run constantly comes out to around $28/mo for me doing it this way. Yes, it's my fault leaving the lights on all the time, And yes I could have added a traditional timer or motion detector, but the issue there was the damn CLFs sucked in winter. These days I could get Cree LED bulbs for about $10, but for $5 more I can get the smart bulbs that work with a system I already have so.... The 4 bulbs have literally paid for themselves in a little over two months. Again though, I imagine I'm a bit of an outlier when it comes to this. Most of these systems will never save the homeowner money.