Ive got the satlook NIT and had a few others in the past as well, the birdog and briefly a trimax 2500. the birdog was great for bell expressvu installs, so fast, light, portable, and great battery life. I loved it. it wasnt of much use on treufta because it was a hassle to reprogram every time I wanted to aim a dish, and didnt support a motor like the satlook. the satlook is awesome for truefta, motor's, and xplornet/wildblue ka installs. when I got out of the install business I sold the birdog and kept the satlook. the trimax imo is a neet idea but not very usefull. they try an throw alot of super cool features into an incredibly small package and fail at them all. I gave it back to a friend a week after aquiring it.
the downfalls of the satlook are big, but workable. its very heavy, the battery life is very poor, and its not waterproof (not even water resistant) all of which suck for a professional installer but are no biggie for a homeuser. Ive heard the promax are sweet little units from a few friends but never had the chance to actually get my hands on them.