Sounds like a WiMAX provider. One of the big solutions to the "last mile" problem of getting broadband to users.
I personally prefer DSL hardline than any kind of connection that could be theoretically intercepted, or be negatively effected by environmental interference. Having lot's of throughput doesn't matter if lot's of packets are being dropped and retransmitted due to interference. Having a clean signal will determine how much of the 1+ Meg you can actually use.
If you have lots of sensitive information on, or transmitted to and fro your system to the Internet (online banking and shopping for example, or sensitive work), then be aware that as easily as an unsecured Wi-Fi hotspots can be used by Wardrivers now (I can access 4 neighbor's WAPs now, and 15 between here and the college), the potential for Wardrivers to hack WiMAX is a possibility, if not already a fact. You could add the system, yet feel you need to encrypt more data over the wireless network for security reasons, and lose the the additional throughput to the encryption protocols.
Should not be any delay involved, as there is with satellite connections. Compare the uplink and downlink speeds of each system to give you an idea of what total throughput would be. More is better.
Also, is that 1+ Meg dedicated speeds, or is that the maximum based on usage? For example; DSL numbers are usually fixed to what you have access to. Cable modems (which often advert higher numbers) are usually just large neighborhood networks, everyone shares the throughput, so when everyone is online and downloading, your slice of the pie get's smaller (cable also leaves your system more susceptible to some hack and malicious code attempts since you are on the same network as the idiot down the street with no security on his system and being used as a launching point).
Look at the cost/benefit/risk analysis. Do you need more throughput? What are the actual numbers each way for the two networks? How much security do you require? What potential interference will the connection face?
WiMAX is the big thing for rural America broadband access. Those that don't have access to cable or DSL and don't want cost or delay of satellite, WiMAX is their best bet for the future. But, for me, since DSL is available.......