I've found most of them, ESPECIALLY the UV5R's, to come under-deviated from the factory; this apparently so that the internal condenser mic will NOT pick up much background noise (say for example more than 2" away from the face of the radio.) Therefore, to get them to properly deviate, you MUST close talk them.
I would NOT advise disassembling the unit and attempting to adjust the FM deviation internally however (if there IS such an adjustment in these models) chiefly BECAUSE once you run an external lapel or speaker microphone, you'll get PLENTY of deviation and/or background noise. So be advised.
Other than that, they represent a pretty good value with perhaps the MOST bang for the buck out there today.
For example, back in 1991, the very first piece of BRAND NEW Amateur gear I ever bought was an Alinco DJ-560T, dual band handheld, that, in 1991 money, costs $399.95. And then, on top of that, I had to buy the drop in charger, additional NiCad battery packs, a dual band 'gain' ducky, a handheld speaker mic, car charger, etc....... it all adds up. (Thankfully, it has (and continues to) given me reliable service these past 23+ years... so it has 'paid' for itself.) Compare this however to Baofeng, and for the money I paid in 1991, in TODAY's dollars, I could equip my WHOLE NEIGHBORHOOD with Baofengs, <spelling> with ALL the accessories, for LESS $$$.
Having said that, my FAVORITE handheld is: the Kenwood TH-F6A, AWESOME little tribander that can do everything my Alinco can, PLUS 220, PLUS wideband HF receive WITH SSB/AM/CW receive on HF. I do believe this (somewhat long in the tooth) Kenwood model represents the absolute MOST BANG FOR THE BUCK out there. Not only can I use it as a VHF/UHF FM transceiver, but I can use it as an HF receiver for a compact QRP CW transmitter when backpacking, etc., should I so desire.