I've had the Samsung M610 for a few days now, but I'll defer to Laptop magazine for their in-depth, mostly-fair review. Author Jeff Wilson gives it 3.5 out of 5 stars, and promises if you like small cellphones with tons of multimedia options, the M610 will do the job. I agree with this point. But some of the review is just nit picky. For instance...
yes, the microSD slot is located underneath the battery, but how many times do you actually remove the microSD card? If it's more than once in a while, you might do well to buy a real camera. Laptop also claims that the M610 isn't as full-featured as the LG Fusic, but I'll be damned if my friends didn't mark out at all the things it can do. This is relevant because my friends are in the age group that LG/Sprint is marketing the cellphone: young 20-somethings with lemonade stand money to spend.
The Sprint Power Vision Network is really quite hip and trendy, according to my dopey friends. Never underestimate the power to download ThisWeeksHitSingle to a cellphone. (Granted, for $2.50 a pop, but it's all free with the review unit.)
Overall, the review definitely points out the cellphone's strengths (thinner than the RAZR, tons of multimedia nonsense to play around with, really nice "feel" to it, etc.) while throwing in a few rounds of "well it should do this." Whatever. It's a better-than-decent cellphone and is a lot better than the LG Chocolate, my usual day-to-day cellphone and a definite competitor in the "look how cool my phone looks" department.
Samsung M610 [Laptop Magazine]